KR102657959B1 - Method and apparatus for power and processing savings for positioning reference signals transmitted in beams - Google Patents

Abstract

A mobile device supports positioning using PRSs on multiple beams by splitting positioning reference signal (PRS) processing into two distinct modes: acquisition mode and tracking mode. In acquisition mode, the mobile device performs a high-speed scan of all beams from the base station transmitting the PRS using less than the full set of resources for the PRS, i.e., less than the full bandwidth and/or less than the full number of repetitions for the PRS. The mobile device may select the best beams to use for positioning based, for example, on signal strength metrics. In tracking mode, the mobile device tracks the PRS from only selected beams using the full set of resources for the PRS. The mobile device may return to acquisition mode after a predetermined number of positioning opportunities or when the selected beams are no longer valid due to movement or changing conditions.

Description

Method and apparatus for power and processing savings for positioning reference signals transmitted in beams

[0001] This application claims the benefit and priority of U.S. Non-regular Application No. 17/135,461, filed on December 28, 2020 and entitled “METHOD AND APPARATUS FOR POWER AND PROCESSING SAVINGS FOR POSITIONING REFERENCE SIGNALS TRANSMITTED IN BEAMS” Claimed to be assigned to the assignee of this application and incorporated herein by reference in its entirety.

[0002] The subject matter disclosed herein relates to wireless communication systems, and more particularly to methods and apparatuses for position location of a mobile device.

[0003] The location of a mobile device, such as a cellular phone, may be useful or essential for a number of applications, including emergency calls, navigation, direction finding, asset tracking, and Internet services. The location of a mobile device may be estimated based on information collected from various systems. For example, in cellular networks implemented according to 4G (also referred to as 4th generation) Long Term Evolution (LTE) radio access or 5G (also referred to as 5th generation) “New Radio (NR)”, a base station uses a positioning reference (PRS) signal) can be transmitted. A mobile device that obtains PRSs transmitted by different base stations signals to a location server, which may be part of an Evolved Packet Core (EPC) or a 5G Core Network (5GCN), for use in computing a location estimate for the mobile device. Based measurements can be communicated. For example, the UE may generate positioning measurements from a downlink (DL) PRS, such as Reference Signal Time Difference (RSTD), Reference Signal Received Power (RSRP), and reception and transmission (RX-Tx) time difference measurements, which It can be used in various positioning methods, such as Time Difference of Arrival (TDOA), Angle of Departure (AoD), and multi-cell Round Trip Time (RTT). Alternatively, the mobile device may compute an estimate of its location using various positioning methods. Other position methods that may be used for mobile devices include the use of Global Navigation Satellite Systems (GNSS), such as GPS, GLONASS or Galileo, and the use of Assisted GNSS (A-GNSS), where the network provides assistive data to the mobile device. Provides assistance to a mobile device in acquiring and measuring GNSS signals and/or computing a location estimate from GNSS measurements.

[0004] For 5G NR cellular networks, base stations will utilize an array of antenna elements for beamforming. For a large number of antenna elements, beamforming can be used to generate very narrow beams that can be swept horizontally (azimuthally) and vertically (altitudeally) to form a spatial grid of beams. Implementation of positioning using beam transmissions can be implemented, for example, for UI, DL, or UL and DL approaches to estimate Angle of Departure (AoD) and/or Angle of Arrival (AoA) at the gNB, as well as UE- Progress is being made on basic, UE-assisted, positioning techniques. One important consideration is the power and processing required for positioning using the received PRS in multiple transmitted beams.

[0005] A mobile device can support positioning using PRSs on multiple beams by splitting positioning reference signal (PRS) processing into two distinct modes: an acquisition mode and a tracking mode. In acquisition mode, the mobile device performs a high-speed scan of all beams from the base station transmitting the PRS using less than the full set of resources for the PRS, i.e., less than the full bandwidth and/or less than the full number of repetitions for the PRS. The mobile device may select the best beams to use for positioning based, for example, on a signal strength metric. In tracking mode, the mobile device tracks the PRS from only selected beams using the full set of resources for the PRS. The mobile device may return to acquisition mode after a predetermined number of positioning opportunities or when the selected beams are no longer valid due to movement or changing conditions.

[0006] In one implementation, a method for supporting positioning of a mobile device in a wireless network, performed by a mobile device, uses resources of less than the full set of positioning reference signals (PRS) generated by each beam. and receiving a PRS transmitted in a plurality of beams from a base station, wherein the less than full set of resources for the PRS include less than the full set of bandwidth, less than the full number of repetitions in a positioning opportunity, or a combination thereof. The method may include selecting a predetermined number of beams from a plurality of beams. The method may include receiving a PRS from the selected beams using the full set of resources for the PRS generated by each selected beam.

[0007] In one implementation, a mobile device configured to support positioning of a mobile device in a wireless network includes: a wireless transceiver configured to communicate wirelessly in a wireless network; at least one memory; and at least one processor coupled to the wireless transceiver and at least one memory. The at least one processor may be configured to use a wireless transceiver to receive positioning reference signals (PRS) transmitted in a plurality of beams from a base station using less than the full set of resources for each beam. , less than a full set of resources for the PRS include less than a full set of bandwidth, less than a full set of repetitions in a positioning opportunity, or a combination thereof. At least one processor may be configured to select a predetermined number of beams from a plurality of beams. At least one processor may be configured to receive a PRS from the selected beams using the full set of resources for the PRS generated by each selected beam using a wireless transceiver.

[0008] In one implementation, a mobile device configured to support positioning of a mobile device in a wireless network includes a plurality of beams from a base station using less than a full set of resources for positioning reference signals (PRS) generated by each beam. and means for obtaining a PRS to be transmitted, wherein the less-than-full set of resources for the PRS include less-than-full bandwidth, less-than-full number of repetitions in a positioning opportunity, or a combination thereof. The mobile device may include means for selecting a predetermined number of beams from a plurality of beams. The mobile device may include means for receiving a PRS from selected beams using the full set of resources for the PRS generated by each selected beam.

[0009] In one implementation, a non-transitory computer-readable storage medium having program code stored thereon, the program code operable to configure at least one processor of a mobile device to support positioning of the mobile device in a wireless network, the program The code includes program code for receiving PRS transmitted in a plurality of beams from a base station using resources less than the full set of positioning reference signals (PRS) generated by each beam, the full set of positioning reference signals (PRS) generated by each beam. Sub-resources include less-than-full bandwidth, less-than-full number of repetitions in a positioning opportunity, or a combination thereof. A non-transitory computer readable storage medium can include program code for selecting a predetermined number of beams from a plurality of beams. The non-transitory computer readable storage medium may include program code for receiving a PRS from selected beams using the full set of resources for the PRS generated by each selected beam.

[0010] Figure 1 illustrates an example wireless communication system in accordance with various aspects of the present disclosure.
[0011] FIGS. 2A and 2B illustrate example wireless network structures in accordance with various aspects of the present disclosure.
[0012] FIG. 3 illustrates a block diagram of a design of a base station and a UE, which may be one of the base stations and user equipment (UEs) of FIG. 1.
[0013] Figure 4 shows the structure of an example subframe sequence for a positioning reference signal (PRS).
[0014] Figure 5 illustrates nine different positioning reference signal (PRS) frame structures with variable symbol and comb values.
[0015] Figure 6 illustrates an example of narrow beams that can be produced by an antenna panel for a base station.
[0016] Figure 7 illustrates a positioning procedure performed by a UE and a base station using PRS in the transmit beams.
[0017] Figure 8 is a graph illustrating multiple transmit beams and a positioning process using PRS in the beams.
[0018] Figure 9 is a flow diagram illustrating the positioning process in which PRS processing is split into two distinct modes: acquisition mode and tracking mode.
[0019] Figure 10 illustrates a graph of simulated channel energy response (CER) for a PRS processed using different portions of the full set of resources.
[0020] FIGS. 11A and 11B are graphs illustrating multiple transmit beams and a positioning process using an acquisition mode that uses less than the full set of resources for PRS and tracking modes.
[0021] Figure 12 is a graph illustrating a positioning process using an acquisition mode with multiple transmit beams and an increased portion of resources used to process the PRS.
[0022] Figure 13 is a graph illustrating a positioning process using an acquisition mode in which multiple transmit beams and some of the resources used for processing the PRS are reduced.
[0023] Figures 14A and 14B illustrate graphs showing processing and power savings through use of capture and tracking modes.
[0024] Figure 15 illustrates a schematic block diagram illustrating certain example features of a mobile device that can support positioning using acquisition mode and tracking mode.
[0025] Figure 16 illustrates a flow diagram of an example method for supporting positioning of a mobile device in a wireless network.
[0026] Elements are indicated by numeric labels in the figures, with similarly numbered elements in different figures representing the same element or similar elements. Different instances of a common element are indicated by following the numeric label for the common element with a separate numeric suffix. In this case, a reference to a numeric label without a suffix denotes an arbitrary instance of a common element. For example, Figure 1 includes four distinct network cells labeled 110a, 110b, 110c, and 110d. Accordingly, reference to cell 110 corresponds to any of cells 110a, 110b, 110c, and 110d.

[0027] The terms “mobile device,” “mobile stations (MS),” “user equipment” (UE), and “target” are used interchangeably herein and refer to a cellular or other wireless communication device, personal communication system) device, personal navigation device (PND), personal information manager (PIM), personal digital assistant (PDA), laptop, smartphone, tablet, or other suitable mobile device capable of receiving wireless communication and/or navigation signals. It can refer to devices such as . These terms also refer to, for example, short-range wireless, infrared, or wired connections, regardless of whether the reception of satellite signals, reception of auxiliary data, and/or position-related processing occurs on the device or on a personal navigation device (PND). , or other connection, it is intended to include devices that communicate with the PND.

[0028] Additionally, the terms MS, UE, “mobile device,” or target refer to whether satellite signal reception, assistance data reception, and/or position-related processing occurs on a device, a server, or a device associated with a network. and/or to a server over, for example, the Internet, Wi-Fi, a cellular wireless network, a Digital Subscriber Line (DSL) network, a packet cable network, or any other network. It is intended to include all devices, including wireless and wired communication devices, computers, laptops, etc., capable of communicating. Any operable combination of the above is also considered a “mobile device.”

[0029] The detailed description set forth below in conjunction with the accompanying drawings is intended as a description of various configurations and is not intended to represent the only configurations in which the concepts described herein may be practiced. The detailed description includes specific details for the purpose of providing a thorough understanding of various concepts. However, it will be apparent to those skilled in the art that these concepts may be practiced without these specific details. In some instances, well-known structures and components are shown in block diagram form to avoid obscuring these concepts.

[0030] The techniques described herein may be used in various wireless communication networks, such as code-division multiple access (CDMA), time-division multiple access (TDMA), frequency-division multiple access (FDMA), orthogonal frequency-division multiple access (OFDMA). access), single-carrier FDMA (SC-FDMA), and other networks. The terms “network” and “system” are often used interchangeably. A CDMA network may implement radio technologies such as Universal Terrestrial Radio Access (UTRA), cdma2000, etc. UTRA includes Wideband CDMA (WCDMA) and other variants of CDMA. cdma2000 covers IS-2000, IS-95 and IS-856 standards. TDMA networks can implement radio technologies such as Global System for Mobile Communications (GSM). OFDMA networks may implement radio technologies such as Evolved UTRA (E-UTRA), Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDMA, etc. UTRA and E-UTRA are part of the Universal Mobile Telecommunication System (UMTS). 3GPP Long Term Evolution (LTE) and LTE-Advanced (LTE-A) are new releases of UMTS that use E-UTRA. UTRA, E-UTRA, UMTS, LTE, LTE-A and GSM are described in documents from an organization named "3rd Generation Partnership Project (3GPP)". CDMA2000 and UMB are described in documents from the "3rd Generation Partnership Project 2" ( The techniques described herein are described in documents from an organization named 3GPP2) as well as other wireless networks and radio technologies, such as next-generation (e.g., mmWave band). It can be used for 5th generation (5G) New Radio (NR) networks operating in the field.

[0031] Beamformed transmissions are expected to be widely deployed in 5G NR deployments using mmWave operating using spectrum below 6 GHz, such as sub-6, and spectrum above 24 GHz. For example, a base station with a large number of antenna elements can beamform to transmit the beams as a set of beams over a range of horizontal (azimuth) and vertical (elevation) angles to form a spatial grid of beams.

[0032] The UE may adopt signaling/reporting according to the “time first detected”/“time of arrival” metric instead of the L1-RSRP (Reference Signal Received Power) metric. Accordingly, the beam of interest to the UE is the beams from the base station with the earliest first detected channel tap, and the first detected channel tap has a predetermined delay from the first detected tap of the beam with the earliest first tap. These are the beams within.

[0033] In 5G NR, base stations may transmit a downlink (DL) positioning reference signal (PRS) that is processed and measured by the UE to determine a location estimate of the UE. For example, the UE may generate positioning measurements from the DL PRS, such as Reference Signal Time Difference (RSTD), Reference Signal Received Power (RSRP), and reception and transmission (RX-Tx) time difference measurements, which can be used in various positioning methods. It can be used to determine a location estimate for the UE, such as Time Difference of Arrival (TDOA), Angle of Departure (AoD), and multi-cell Round Trip Time (RTT). In some implementations, the UE may generate positioning measurements using a DL PRS, which may be transmitted to a remote location server to calculate a location estimate for the UE in a UE-assisted positioning process, or the UE may generate positioning measurements using a DL PRS in a UE-assisted positioning process. You can calculate your own location estimate.

[0034] In 5G NR, PRS signals are provided with expanded flexibility for LTE. For example, in 5G NR, a PRS may be transmitted with multiple symbols and comb options per subframe and may be transmitted over multiple subframes, i.e., may be repeated in the time domain at each positioning opportunity. Moreover, multiple beams can transmit each PRS, and the beams can be repeated to improve performance. Additionally, multiple PRS opportunities may be used.

[0035] However, expanded PRS flexibility results in significantly increased power and processing requirements for receiving PRS. Improvements are needed to reduce memory and processing requirements for PRS reception using 5G NR.

[0036] Accordingly, in one implementation, positioning of a mobile device may be supported by splitting PRS processing into two distinct modes, such as an acquisition mode and a tracking mode. In acquisition mode, the mobile device performs a high-speed scan of all beams from the base station transmitting the PRS using less than the full set of resources for the PRS. For example, the mobile device can capture the PRS in each beam using the bandwidth of the sub-full PRS, the number of repetitions of the sub-full PRS, or a combination thereof. Using less than the full set of resources for the PRS for each beam, the mobile device can select a predetermined number of beams to be used in tracking mode. For example, the mobile device may use one or more of signal strength metrics, such as Signal to Noise Ratio (SNR), Reference Signal Received Power (RSRP), or Reference Signal Received Quality (RSRQ), to select beams to be used in tracking mode. there is. In tracking mode, the mobile device tracks the PRS from selected beams using the full set of resources for the PRS generated by each selected beam. The mobile device can perform desired positioning measurements using PRS from selected beams while in tracking mode.

[0037] By using less than the full set of resources for the PRS from each beam during acquisition mode, and using the full set of resources for the PRS only after a reduced number of beams have been selected for tracking, the mobile device can achieve positioning. The power and processing requirements needed to process PRS can be significantly reduced.

[0038] Figure 1 illustrates an example wireless communication system 100. A wireless communication system 100 (which may also be referred to as a wireless wide area network (WWAN)) may include various base stations 102 and various UEs 104. Base stations 102 may include macro cell base stations (high power cellular base stations) and/or small cell base stations (low power cellular base stations). In one aspect, the macro cell base station may include eNBs where the wireless communication system 100 corresponds to an LTE network, or gNBs where the wireless communication system 100 corresponds to a 5G network, or a combination of both. , small cell base stations may include femto cells, pico cells, micro cells, etc.

[0039] The base stations 102 collectively form a RAN and are connected to the core network 170 via backhaul links 122 and via the core network 170 to one or more location servers 172 (e.g., It can interface with evolved packet core (EPC) or next generation core (NGC). Location servers 172 may be internal or external to core network 170. In some implementations, location server 172 may be an E-SMLC for LTE access, a standalone SMLC (SAS) for UMTS access, an SMLC for GSM access, or a Location Management Function (LMF) for 5G NR access. . Additionally or alternatively, the location server may be within the RAN and may be co-located with or part of a serving base station 102, sometimes referred to as a Location Server surrogate (LSS) 117. LSS 117 may replace location server 172, e.g., to improve latency, or may operate in conjunction with location server 172 to perform some functions, e.g., that would otherwise be 172). In addition to other functions, base stations 102 may perform transmission of user data, radio channel encryption and decryption, integrity protection, header compression, mobility control functions (e.g., handover, dual access), and inter-cell interference coordination. , connection setup and teardown, load balancing, distribution of non-access stratum (NAS) messages, NAS node selection, synchronization, RAN sharing, multimedia broadcast multicast service (MBMS), subscriber and device trace, RAN information management (RIM) , may perform functions related to one or more of paging, positioning, and delivery of warning messages. Base stations 102 may communicate with each other indirectly (e.g., via EPC/NGC) or directly via backhaul links 134, which may be wired or wireless.

[0040] Base stations 102 may communicate wirelessly with UEs 104. Each of the base stations 102 may provide communications coverage for a respective geographic coverage area 110 . In one aspect, one or more cells may be supported by base station 102 in each coverage area 110. A “cell” is a logical communication entity used for communication with a base station (e.g., over some frequency resource referred to as a carrier frequency, component carrier, carrier, band, etc.), and refers to cells operating over the same or different carrier frequencies. It may be associated with an identifier (eg, physical cell identifier (PCID), virtual cell identifier (VCID)) for identification. In some cases, different cells may use different protocol types (e.g., machine-type communication (MTC), narrowband IoT (NB-IoT), enhanced mobile (eMBB) that can provide access to different types of UEs. It can be configured according to (broadband), etc.). In some cases, the term “cell” may also refer to a geographic coverage area (e.g., sector) of a base station insofar as a carrier frequency can be detected and used for communications within some portion of the geographic coverage areas 110. You can.

[0041] Neighboring macro cell base station 102 geographic coverage areas 110 may partially overlap (e.g., in a handover area), but some of the geographic coverage areas 110 may be larger than the geographic coverage area 110. ) can be substantially overlapped. For example, small cell base station 102' may have a coverage area 110' that substantially overlaps the coverage area 110 of one or more macro cell base stations 102. A network that includes both small cell and macro cell base stations may be known as a heterogeneous network. The heterogeneous network may also include home eNBs (HeNBs) that can provide services to a limited group known as a closed subscriber group (CSG).

[0042] Communication links 120 between base stations 102 and UEs 104 may include UL (also referred to as reverse link) transmissions from the UE 104 to the base station 102 and/or base station ( may include downlink (DL) (also referred to as forward link) transmissions from 102) to UE 104. Communication links 120 may use MIMO antenna technology including spatial multiplexing, beamforming, and/or transmit diversity. Communication links 120 may traverse one or more carrier frequencies. The allocation of carriers may be asymmetric for DL and UL (eg, more or fewer carriers may be assigned to DL than UL).

[0043] The wireless communication system 100 includes a wireless local area network (WLAN) AP (AP) that communicates with WLAN stations (STAs) 152 via communication links 154 in an unlicensed frequency spectrum (e.g., 5 GHz). may further include an access point) (150). When communicating in unlicensed frequency spectrum, WLAN STAs 152 and/or WLAN AP 150 may perform a clear channel assessment (CCA) prior to communicating to determine whether a channel is available.

[0044] The small cell base station 102' may operate in licensed and/or unlicensed frequency spectrum. When operating in an unlicensed frequency spectrum, small cell base station 102' may utilize LTE or 5G technology and may use the same 5 GHz unlicensed frequency spectrum used by WLAN AP 150. Small cell base stations 102' utilizing LTE/5G in unlicensed frequency spectrum may boost coverage for and/or enhance the capabilities of the access network. LTE in unlicensed spectrum may be referred to as LTE-unlicensed (LTE-U), licensed assisted access (LAA), or MulteFire.

[0045] In 5G, the frequency spectrum in which wireless nodes (e.g., base stations 102, UEs 104) operate is comprised of multiple frequency ranges: FR1 (4.1 GHz to 7.125 GHz), FR2 (24.25 GHz to 24.25 GHz) 52.6 GHz), and FR4 (between the 52.6 GHz - 114.25 GHz bands). The wireless communication system 100 may further include a millimeter wave (mmW) base station 102, which may be a small cell base station, capable of operating at mmW frequencies and/or near mmW frequencies, in communication with the UE 104. You can. EHF (extremely high frequency) is the RF part of the electromagnetic spectrum. EHF ranges from 30 GHz to 300 GHz and has a wavelength from 1 millimeter to 10 millimeters. Radio waves in this band may be referred to as millimeter waves. Near mmW can extend down to a frequency of 3 GHz with a wavelength of 100 millimeters. The super high frequency (SHF) band extends from 3 GHz to 30 GHz and is also referred to as centimeter wave. Communications using the mmW/near mmW radio frequency band have high path loss and relatively short range. The mmW base station 102 and UE 104 may utilize beamforming (transmit and/or receive) over the mmW communication link 120 to compensate for the extremely high path loss and short range. Additionally, it will be appreciated that in alternative configurations, one or more base stations 102 may also transmit using mmW or near mmW and beamforming. Additionally, the mmW base station may operate in some frequency allocation in the upper millimeter wave bands, such as between 24 GHz and 114 GHz, or other ranges therein, such as between 24.25 GHz and 52.6 GHz or other ranges. Alternatively, ultra-widebandwidth operation may also be at sub-THz frequencies (exceeding 100 GHz or 275 GHz or 300 GHz depending on how the sub-THz regime is defined). Accordingly, it will be appreciated that the foregoing examples are examples only and should not be construed as limiting on the various aspects disclosed herein.

[0046] Transmission beamforming is a technique for focusing RF signals in a specific direction. Typically, when a network node (eg, base station) broadcasts an RF signal, it broadcasts the signal in all directions (omni-directionally). Using transmit beamforming, a network node determines where a given target device (e.g., UE) is located (relative to the transmitting network node) and projects a stronger downlink RF signal in that specific direction, thereby Provides a faster and stronger RF signal (in terms of data rate) for (s). To change the directionality of an RF signal when transmitting, a network node can control the phase and relative amplitude of the RF signal in each of one or more transmitters that are broadcasting the RF signal. For example, a network node may have an array of antennas (referred to as a "phased array" or "antenna array") that generates a beam of RF waves that can be "steering" to point in different directions without actually moving the antennas. You can use it. Specifically, the RF current from the transmitter is supplied to the individual antennas in a precise phase relationship such that radio waves from the separate antennas add up and cancel out to suppress radiation in undesired directions while increasing radiation in the desired direction. do.

[0047] In receive beamforming, a receiver uses a receive beam to amplify RF signals detected on a given channel. For example, the receiver may increase the gain setting and/or adjust the phase setting of the array of antennas in a particular direction to amplify (e.g., increase the gain level) RF signals received from that direction. Therefore, when a receiver is said to be beamforming in a particular direction, it means that the beam gain in that direction is greater than the beam gain along other directions, or the beam gain in that direction is greater than that of all other receive beams available to the receiver. This means that it is the largest compared to the beam gain of . This results in stronger received signal strength (e.g., reference signal received power (RSRP), reference signal received quality (RSRQ), signal-to-interference-plus-noise ratio (SINR), etc.) of RF signals received from that direction. bring about

[0048] A wireless communication system 100 includes one or more UEs, such as UEs, indirectly connected to one or more communication networks through one or more device-to-device (D2D) peer-to-peer (P2P) links. 190) may further be included. In the example of FIG. 1 , UE 190 connects one of the UEs 104 to a D2D P2P link 192 connected to one of the base stations 102 (e.g., through which UE 190 indirectly accesses cellular connectivity). can be obtained) and a D2D P2P link 194 where the WLAN STA 152 is connected to the WLAN AP 150 (through which the UE 190 can indirectly obtain WLAN-based Internet connectivity) have In one example, D2D P2P links 192 and 194 may be supported with any well-known D2D RAT, such as LTE Direct (LTE-D), WiFi Direct (WiFi-D), Bluetooth®, etc.

[0049] The wireless communication system 100 includes a UE 104 that can communicate with a macro cell base station 102 over a communication link 120 and/or with a mmW base station 102 over a mmW communication link 120. More may be included. For example, the macro cell base station 102 may support a PCell, one or more SCells for the UE and the mmW base station 102 may support one or more SCells for the UE.

[0050] Figure 2A illustrates an example wireless network architecture 200. For example, NGC 210 (also referred to as “5GC”) functionally includes control plane functions 214 (e.g., UE registration, authentication, network access, gateway selection, etc.) and user plane functions 212 (e.g. , UE gateway function, access to data networks, IP routing, etc.), which operate cooperatively to form a core network. A user plane interface (NG-U) 213 and a control plane interface (NG-C) 215 connect the gNB 222 to the NGC 210 and specifically control plane functions 214 and user plane functions. Connect to (212). In a further configuration, eNB 224 also connects to NGC 210 via NG-C 215 for control plane functions 214 and NG-U 213 for user plane functions 212 It can be. Additionally, eNB 224 may communicate directly with gNB 222 via backhaul connection 223. In some configurations, the new RAN 220 may have only one or more gNBs 222 , while other configurations include one or more of both eNBs 224 and gNBs 222 . The gNB 222 or eNB 224 may communicate with UEs 204 (e.g., any of the UEs shown in FIG. 1). Other optional aspects may include one or more location servers 230a, 230b (sometimes collectively referred to as location server 230) (which may correspond to location server 172), which may be used to control UEs. may communicate with control plane functions 214 and user plane functions 212, respectively, at NGC 210 to provide location assistance for 204. Location server 230 may be implemented as a plurality of separate servers (e.g., physically separate servers, different software modules on a single server, different software modules spread across multiple physical servers, etc.) , or alternatively, each may correspond to a single server. Location server 230 is configured to support one or more location services for UEs 204 that may be connected to location server 230 via the core network, NGC 210, and/or via the Internet (not illustrated). It can be configured. Additionally, location server 230 may be integrated into a component of the core network, or alternatively may be external to the core network, such as in RAN 220. Additionally, a Location Server Surrogate (LSS) (e.g., LSS 117 shown in FIG. 1) may be located in the RAN 220 and may be co-located, e.g., with gNB 222, May perform one or more location management functions.

[0051] FIG. 2B illustrates another example wireless network structure 250. For example, NGC 260 (also referred to as “5GC”) includes an access and mobility management function (AMF) 264, a user plane function (UPF) 262, a session management function (SMF) 266, and an SLP ( 268) and the control plane functions provided by LMF 270, which operate cooperatively to form a core network (i.e., NGC 260). User plane interface 263 and control plane interface 265 connect ng-eNB 224 to NGC 260 and specifically to UPF 262 and AMF 264, respectively. In a further configuration, gNB 222 may also be connected to NGC 260 via control plane interface 265 to AMF 264 and user plane interface 263 to UPF 262. Additionally, eNB 224 may communicate directly with gNB 222 via backhaul connection 223, with or without a gNB direct connection to NGC 260. In some configurations, the new RAN 220 may have only one or more gNBs 222 , while other configurations include one or more of both ng-eNBs 224 and gNBs 222 . The ng-gNB 222 or eNB 224 may communicate with UEs 204 (e.g., any of the UEs shown in FIG. 1). Base stations in the new RAN 220 communicate with AMF 264 over the N2 interface and with UPF 262 over the N3 interface.

[0052] The functions of AMF include registration management, connection management, reachability management, mobility management, lawful interception, transmission of session management (SM) messages between UE 204 and SMF 266, and routing SM messages. Transparent proxy services for, access authentication and access authorization, transmission of short message service (SMS) messages between the UE 204 and a short message service function (SMSF) (not shown), and security anchor functionality (SEAF) ) includes. The AMF also interacts with the authentication server function (AUSF) (not shown) and the UE 204 and receives intermediate keys established as a result of the UE 204 authentication process. For authentication based on the universal mobile telecommunications system (UMTS) subscriber identity module (USIM), the AMF retrieves security material from the AUSF. AMF's functions also include security context management (SCM). SCM receives a key from SEAF that it uses to derive access-network specific keys. The functionality of the AMF also includes location service management for regulated services, between the UE 204 and the location management function (LMF) 270 (which may correspond to the location server 172), as well as with the new RAN 220. Includes transmission of location service messages between LMF 270, evolved packet system (EPS) bearer identifier allocation for interaction with EPS, and UE 204 mobility event notification. In addition, AMF also supports functions for non-3rd Generation Partnership Project (3GPP) access networks.

[0053] The functions of the UPF include acting as an anchor point for intra- and inter-RAT mobility (if applicable) and as an external protocol data unit (PDU) session point for interconnection to a data network (not shown). providing packet routing and forwarding, packet inspection, user plane policy rule enforcement (e.g., gating, redirection, traffic steering), lawful interception (user plane aggregation), traffic usage reporting, and QoS for the user plane ( quality of service) handling (e.g., UL/DL rate enforcement, reflective QoS marking in DL), UL traffic verification (service data flow (SDF) to QoS flow mapping), transport level packet marking in UL and DL, DL packets It includes triggering buffering and DL data notification, and transmission and forwarding of one or more “end markers” to the source RAN node.

[0054] The functions of SMF 266 include session management, UE Internet protocol (IP) address allocation and management, selection and control of user plane functions, configuration of traffic steering in the UPF to route traffic to the appropriate destination, QoS and Includes some control of policy enforcement, and downlink data notification. The interface through which SMF 266 communicates with AMF 264 is referred to as the N11 interface.

[0055] Another optional aspect may include an LMF 270 that can communicate with NGC 260 to provide location assistance for UEs 204. LMF 270 may be implemented as a plurality of separate servers (e.g., physically separate servers, different software modules on a single server, different software modules spread across multiple physical servers, etc.), Or alternatively, each could correspond to a single server. LMF 270 may be configured to support one or more location services for UEs 204 that may be connected to LMF 270 via the core network, NGC 260, and/or via the Internet (not illustrated). You can.

[0056] Figure 3 shows a block diagram of a design 300 of a base station 102 and a UE 104, which may be one of the base stations and UEs of Figure 1. Base station 102 may be equipped with T antennas 334a through 334t, and UE 104 may be equipped with R antennas 352a through 352r, where generally T ≥ 1 and R ≥ 1 am.

[0057] At the base station 102, a transmit processor 320 receives data from a data source 312 for one or more UEs, each based at least in part on channel quality indicators (CQIs) received from the UE. select one or more modulation and coding schemes (MCS) for each UE, process (e.g., encode and modulate) data for each UE based at least in part on the MCS(s) selected for the UE, and Data symbols for these can be provided. The transmit processor 320 also processes system information (e.g., for semi-static resource partitioning information (SRPI), etc.) and control information (e.g., CQI requests, grants, upper layer signaling, etc.) and overhead symbols and Control symbols can be provided. Transmit processor 320 may also generate reference symbols for reference signals (e.g., cell-specific reference signal (CRS)) and synchronization signals (e.g., primary synchronization signal (PSS) and secondary synchronization signal (SSS)). You can. A transmit (TX) multiple-input multiple-output (MIMO) processor 330 may perform spatial processing (e.g., precoding) on data symbols, control symbols, overhead symbols, and/or reference symbols, if applicable. ) can be performed, and T output symbol streams can be provided to T modulators (MODs) 332a to 332t. Each modulator 332 may process each output symbol stream (e.g., for OFDM, etc.) to obtain an output sample stream. Each modulator 332 may further process (e.g., convert to analog, amplify, filter, and upconvert) the output sample stream to obtain a downlink signal. T downlink signals from modulators 332a through 332t may be transmitted via T antennas 334a through 334t, respectively. According to various aspects described in more detail below, synchronization signals may be generated with location encoding to convey additional information.

[0058] At the UE 104, antennas 352a through 352r may receive downlink signals from base station 102 and/or other base stations, and transmit the received signals to demodulators (DEMODs) 354a through 352r. 354r) can be provided respectively. Each demodulator 354 may condition (e.g., filter, amplify, downconvert, and digitize) the received signal to obtain input samples. Each demodulator 354 may further process the input samples (e.g., for OFDM, etc.) to obtain received symbols. MIMO detector 356 may obtain received symbols from all R demodulators 354a through 354r, perform MIMO detection on the received symbols, if applicable, and provide detected symbols. Receive processor 358 processes (e.g., demodulates and decodes) the detected symbols, provides decoded data for UE 104 to data sink 360, and sends decoded control information and system information to the controller/processor. It can be provided at (380). The channel processor may determine reference signal received power (RSRP), received signal strength indicator (RSSI), reference signal received quality (RSRQ), channel quality indicator (CQI), etc. In some aspects, one or more components of UE 104 may be included in a housing.

[0059] In the uplink, at UE 104, transmit processor 364 receives data from data source 362 and data from controller/processor 380 (including, e.g., RSRP, RSSI, RSRQ, CQI, etc.) may receive and process control information (for reports). Transmit processor 364 may also generate reference symbols for one or more reference signals. Symbols from transmit processor 364 are precoded by TX MIMO processor 366, if applicable, and added by modulators 354a through 354r (e.g., for DFT-s-OFDM, CP-OFDM, etc.) may be processed and transmitted to the base station 102. At base station 102, uplink signals from UE 104 and other UEs are sent to antennas 334 to obtain decoded data and control information for the data and control information transmitted by UE 104. Received by, processed by demodulators 332, detected by MIMO detector 336, if applicable, and further processed by receive processor 338. Receiving processor 338 may provide decoded data to data sink 339 and decoded control information to controller/processor 340. Base station 102 includes a communications unit 344 and may communicate with a network controller, such as location server 172, via communications unit 344, which may include one or more intervening elements. Location server 172 may include a communications unit 394, a controller/processor 390, and memory 392.

[0060] Controller/processor 340 of base station 102, controller/processor 380 of UE 104, controller 390 of location server 172, which may be location server 172, and/or Any other component(s) of 3 may perform one or more techniques as described in more detail elsewhere herein. For example, controller/processor 380 of UE 104, controller 390 of location server 172, controller/processor 340 of base station 102, and/or any other component(s) of FIG. may perform or direct the operations of, for example, processes 900 and 1600 of FIGS. 9 and 16, and/or other processes as described herein. Memories 342, 382, and 392 may store data and program codes for base station 102, UE 104, and location server 172, respectively. In some aspects, memory 342, and/or memory 382, and/or memory 392 may include a non-transitory computer-readable medium that stores one or more instructions for wireless communication. For example, one or more instructions, when executed by one or more processors of UE 104, location server 172, and/or base station 102, e.g., processes 900 and 1600 of FIGS. 9 and 16 and /or perform or direct the operations of other processes described herein. Scheduler 346 may schedule UEs for data transmission on the downlink and/or uplink.

[0061] As previously indicated, Figure 3 is provided as an example. Other examples may be different from those described with respect to FIG. 3 .

[0062] In certain implementations, the UE 104 may take location-related measurements (also referred to as location measurements), e.g., measurements on signals received from GPS or other Satellite Positioning Systems (SPS). , may have circuitry and processing resources capable of obtaining measurements on local transceivers and/or measurements on cellular transceivers, such as base stations 102 . The UE 104 may additionally have circuitry and processing resources capable of computing a position fix or estimated location of the UE 104 based on these location-related measurements. In some implementations, location-related measurements obtained by UE 104 may be transmitted to a location server, e.g., location server 172, location servers 230a, 230b, or LMF 270, and then location The server may estimate or determine a location for UE 104 based on the measurements.

[0063] Location-related measurements obtained by UE 104 include measurements of signals received from satellite vehicles (SVs) that are part of an SPS or a Global Navigation Satellite System (GNSS), e.g., GPS, GLONASS, Galileo, or Beidou. and/or measurements of signals received from terrestrial transmitters fixed at known locations (such as base station 102 or other local transceivers). Then, the UE 104 or a separate location server (e.g., location server 172) may, for example, use GNSS, Assisted GNSS (A-GNSS), Advanced Forward Link Trilateration (AFLT), Time Detection (TDOA), etc. Based on these location-related measurements using any one of several position methods such as Difference Of Arrival (Difference Of Arrival), Enhanced Cell ID (ECID), TDOA, AoA, AoD, multi-RTT, or combinations thereof, the UE 104 ) can obtain a location estimate. In some of these technologies (e.g. A-GNSS, AFLT and TDOA), pseudoranges or timing differences are transmitted by pilot signals, positioning reference signals (PRS) or transmitters or SVs and transmitted by the UE ( 104) for three or more ground transmitters fixed at known locations or for four or more SVs with precisely known orbital data, or these Can be measured by the UE 104 for combinations of . Here, location servers, e.g., location server 172, location servers 230a, 230b, or LMF 270, e.g., may provide information regarding signals to be measured by UE 104 (e.g. (e.g., expected signal timing, signal coding, signal frequencies, signal Doppler), locations and/or identities of terrestrial transmitters, and/or A-GNSS, AFLT, TDOA, AoA, AoD, multi-RTT and ECID. Positioning assistance data including signal, timing and orbit information for GNSS SVs to facilitate such positioning techniques may be provided to the UE 104. Facilitating improving signal acquisition and measurement accuracy by UE 104 and/or in some cases, enabling UE 104 to compute its estimated location based on location measurements. It can be included. For example, a location server may be an Alma server that indicates the locations and identities of cellular transceivers and transmitters (e.g., base stations 102) and/or local transceivers and transmitters of a specific area or areas, such as a specific location. may include an almanac (e.g., a Base Station Almanac (BSA)) and information transmitted by these transceivers and transmitters, such as signal power, signal timing, signal bandwidth, signal coding, and/or signal frequency. Information describing the signals may be further included. For ECID, UE 104 may perform measurements of signal strength (e.g., received signal strength (RSSI)) for signals received from cellular transceivers (e.g., base stations 102) and/or local transceivers. strength indication) or reference signal received power (RSRP), and/or signal-to-noise ratio (S/N), reference signal received quality (RSRQ), or The round trip signal propagation time (RTT) between the transceivers 102) or local transceivers may be obtained. UE 104 may send these measurements to a location server to determine a location for UE 104, or in some implementations, UE 104 may send these measurements to determine a location for UE 104. They may be used in conjunction with positioning assistance data received from a location server (e.g., ground almanac data or GNSS SV data, such as GNSS almanac and/or GNSS ephemeris information).

[0064] The estimate of the location of the UE 104 may be referred to as a location, location estimate, location fix, fix, position, position estimate, or position fix, and may be geodetic, thereby providing information about the UE 104. Location coordinates (e.g., latitude and longitude) may be provided, which may or include an elevation component (e.g., height above sea level, height above or below ground level, floor level, or basement level). You may not. Alternatively, the location of UE 104 may be expressed as a civic location (eg, a postal address or the destination of some point or small area within a building, such as a specific room or floor). The location of the UE 104 may also include uncertainty, and then the area in which the UE 104 is expected to be located with some given or default probability or confidence level (e.g., 67% or 95%). Alternatively, it may be expressed as a volume (defined geodically or in the form of a city). The location of the UE 104 may further be an absolute location (e.g., defined in terms of latitude, longitude, and possibly altitude and/or uncertainty) or a distance defined, e.g., relative to some origin of a known absolute location. and a relative location, including direction or relative X, Y (and Z) coordinates. In the description contained herein, use of the term location may include any of these variations unless otherwise indicated. Measurements (e.g., obtained by the UE 104 or by another entity, such as a base station 104) used to determine (e.g., calculate) a position estimate for the UE 104 are called measurements. may be referred to as position measurements, location-related measurements, positioning measurements, or position measurements, and the operation of determining a location for a UE 104 may be referred to as positioning of the UE 104 or locating the UE 104. It may be referred to as .

[0065] Figure 4 shows the structure of an example subframe sequence 400 with positioning reference signal (PRS) positioning opportunities. Subframe sequence 400 may be applicable to the broadcast of PRS signals from a base station (eg, any of the base stations described herein) or another network node. Subframe sequence 400 may be used in LTE systems, and the same or similar subframe sequence may be used in other communication technologies/protocols, such as 5G NR. For example, for 5G NR, the resource grid is almost the same as that used for LTE, but the physical dimensions, such as subcarrier spacing, number of OFDM symbols within a radio frame, change in NR depending on the numerology.

[0066] In Figure 4, time is represented horizontally (e.g., on the (or decrease). As shown in Figure 4, downlink and uplink radio frames 410 may each have a duration of 10 milliseconds (ms). For downlink frequency division duplex (FDD) mode, radio frames 410 are organized into ten subframes 412, each of 1 ms duration, in the illustrated example. Each subframe 412 includes two slots 414, each of e.g. 0.5 ms duration.

[0067] In the frequency domain, the available bandwidth may be divided into evenly spaced orthogonal subcarriers 416 (also referred to as “tones” or “bins”). For example, for a regular length cyclic prefix (CP) using a 15 kHz spacing, subcarriers 416 may be grouped into groups of 12 subcarriers. A resource of one OFDM symbol length in the time domain and one subcarrier (represented by a block of subframes 412) in the frequency domain is referred to as a resource element (RE). Each grouping of 12 subcarriers 416 and 14 OFDM symbols is referred to as a resource block (RB), and in the example above, the number of subcarriers within the resource block is It can be recorded as For a given channel bandwidth, the number of available resource blocks on each channel 422, also referred to as the transmission bandwidth configuration 422, is It is displayed as . For example, for the 3 MHz channel bandwidth in the example above, the number of available resource blocks on each channel 422 is is given as Note that the frequency component of the resource block (eg, 12 subcarriers) is referred to as a physical resource block (PRB).

[0068] The base station transmits radio frames (e.g., radio frames 410) or other physical layer signaling sequences to generate PRS signals (i.e., DL signals) according to frame configurations similar or identical to those shown in FIG. (downlink) PRS), which can be measured and used for UE (e.g., any of the UEs described herein) position estimation. In a wireless communication network, other types of wireless nodes (e.g., distributed antenna system (DAS), remote radio head (RRH), UE, AP, etc.) also have a PRS configured in a similar (or identical) manner to that shown in FIG. 4. Can be configured to transmit signals.

[0069] The set of resource elements used for transmission of PRS signals is referred to as “PRS resource”. The collection of resource elements may span a number of PRBs in the frequency domain and N (e.g., 1 or more) consecutive symbol(s) within a slot 414 in the time domain. For example, cross-hatched resource elements within slots 414 may be examples of two PRS resources. A “PRS resource set” is a set of PRS resources used for transmission of PRS signals, where each PRS resource has a PRS resource identifier (ID). Additionally, PRS resources within a PRS resource set are associated with the same transmission-reception point (TRP). A PRS resource ID within a PRS resource set is associated with a single beam transmitted from a single TRP (where the TRP may transmit one or more beams). Note that this has no implication as to whether the beams and TRPs on which the signals are transmitted are known to the UE.

[0070] PRS may be transmitted in special positioning subframes that are grouped into positioning opportunities. A PRS opportunity is one instance of a periodically repeating time window (eg, consecutive slot(s)) in which a PRS is expected to be transmitted. Each periodically repeating time window may include a group of one or more consecutive PRS opportunities. Each PRS opportunity may include a number N _PRS of consecutive positioning subframes. PRS positioning opportunities for a cell supported by a base station may occur periodically at intervals denoted as milliseconds or the number of subframes T _PRS . As an example, Figure 4 illustrates the periodicity of positioning opportunities, where N _PRS is equal to 4 (418) and T _PRS is greater than or equal to 20 (420). In some aspects, T _PRS may be measured in terms of the number of subframes between the start of consecutive positioning opportunities. Multiple PRS opportunities may be associated with the same PRS resource configuration, in which case each such opportunity is referred to as a “PRS resource opportunity,” etc.

[0071] PRS can be transmitted at constant power. PRS can also be transmitted with zero power (i.e., muted). Muting, which turns off regularly scheduled PRS transmissions, can be useful when PRS signals between different cells overlap by occurring simultaneously or near simultaneously. In this case, PRS signals from some cells may be muted while PRS signals from other cells are transmitted (eg, at constant power). Muting can aid signal acquisition by UEs and time of arrival (TOA) and reference signal time difference (RSTD) measurements of unmuted PRS signals (by avoiding interference from muted PRS signals). Muting can be viewed as non-transmission of PRS for a given positioning opportunity for a particular cell. Muting patterns (also referred to as muting sequences) may be signaled to the UE (eg, using the LTE positioning protocol (LPP)) using bit strings. For example, if the bit in position j is set to '0' in the bit string signaled to indicate the muting pattern, the UE may infer that the PRS is muted for the jth positioning opportunity.

[0072] To further improve the audibility of PRS, the positioning subframes may be low interference subframes that are transmitted without user data channels. As a result, in ideally synchronized networks, the PRS may be interfered with by the PRS of other cells with the same PRS pattern index (i.e., with the same frequency shift) rather than from data transmissions. Frequency shifting occurs at a cell or other transmission point (TP) ( as a function of the PRS ID for the physical cell identifier (PCI) (denoted as (denoted as ), which results in an effective frequency reuse factor of 6.

[0073] Additionally, to improve the audibility of the PRS (e.g., when the PRS bandwidth is limited to only 6 resource blocks corresponding to, say, 1.4 MHz bandwidth), continuous PRS positioning opportunities (or continuous PRS The frequency band for subframes) can be changed in a known and predictable manner through frequency hopping. Additionally, a cell supported by a base station may support more than one PRS configuration, where each PRS configuration may have a distinct frequency offset ( vshift ), a distinct carrier frequency, a distinct bandwidth, a distinct code sequence, and/or It may include a distinct sequence of PRS positioning opportunities with a specific number of subframes (N _PRS ) and a specific period (T _PRS ) per positioning opportunity. In some implementations, one or more of the PRS configurations supported in a cell may be for a directional PRS, followed by additional distinct configurations, such as distinct transmission directions, distinct ranges of horizontal angles, and/or distinct ranges of vertical angles. It can have characteristics.

[0074] As described above, the PRS configuration, including the PRS transmission/muting schedule, is signaled to the UE to enable the UE to perform PRS positioning measurements. The UE is not expected to perform detection of PRS configurations blindly.

[0075] Figure 5 illustrates nine different DL positioning reference signal (PRS) frame structure options available in 5G NR, where each PRS frame structure in Figure 5 illustrates the transmission of a DL PRS with a shaded square. do. The DL PRS resource may span 2, 4, 6, or 12 consecutive symbols in slots in a staggered pattern of 2, 4, 6, or 12 in the frequency-domain. PRS frame structures are identified by the number of symbols in the subframe within each sub-carrier in which the PRS is transmitted. The term “symbol” is well defined in LTE and NR as a set of sub-carriers transmitted over some common fixed time duration. PRS frame structures are further identified by a staggering of the transmit frequency in each symbol, referred to as a comb. For example, the top left PRS frame structure uses 2 symbols (with a DL-PRS-ResourceSymbolOffset of 3), where only every other sub-carrier is utilized within each symbol, i.e. comb-2. . The bottom left PRS frame structure uses 6 symbols (DL-PRS-ResourceSymbolOffset of 2), and only every 6th sub-carrier is utilized within each symbol, i.e. comb-6. Accordingly, the top row of Figure 5 illustrates three PRS frame structures with 2, 4, and 6 symbols, all of which have a comb 2 structure, and the middle row with 12, 4, and 12 symbols. and illustrates three PRS structures with comb-2, comb-4, and comb-4 structures, respectively, and the bottom row has 6, 12, and 12 symbols with comb-6, comb-6, and comb-12 structures, respectively. Illustrates three PRS frame structures with .

[0076] Therefore, for each transmitted PRS, the PRS is repeated over multiple subframes in each positioning opportunity. Additionally, PRS is transmitted with a bandwidth that is the entire frequency spectrum, eg, all subcarrier frequencies. During reception of a PRS, UE 104 tunes the radio signal receiver to the bandwidth of the PRS and receives, processes, and integrates across all iterations of the PRS to generate PRS measurements for the sub-frame or frame.

[0077] FIG. 6 illustrates an example of narrow beams that may be produced by antenna panel 602 for base station 102. Antenna panel 602 includes a number of separate antennas provided with RF currents having precise phase relationships from a transmitter such that radio waves from the separate antennas are added together to produce a beam that directs radiation in the desired direction. increases, while canceling out to suppress radiation in unwanted directions. The beam can be steered to point in different directions, such as by changing the azimuth and elevation angles, without moving the antenna panel 602. 6 illustrates an antenna panel 602 at the center of a sphere 600, e.g., representing azimuth angles from 0°, ±90° to 180°, and elevation angles from 0°, ±90° to 180°. Antenna panel 602 can be controlled to produce beams at various angles, illustrated as beams 604, 606, and 608. Typically, antenna panel 602 is capable of producing an azimuth span of 120° and an elevation span of 60°. By increasing the number of individual antennas present in the antenna panel 602, the width of the generated beams can be reduced. Initial link acquisition at base stations may be performed through beamformed transmissions in Secondary Synchronization Blocks (SSBs). Beam fine-tuning beyond the SSB stage is performed over channel state information reference signals (CSI-RS) or sounding reference signals (SRS). These stages lead to improved beams at both the base station and user ends. Each beam transmitted by the base station may include a PRS.

[0078] As an example, Figure 7 illustrates a positioning procedure 700 performed by UE 104 and base station 102 using PRS in the transmit beams. Base station 102, which may be a GNB, transmits PRS resources in a beam-sweeping manner, illustrated as beams 702, 704, and 706, labeled PRS#1, PRS#2, and PRS#3, respectively. . UE 104 may receive one or more PRS resources on beams 702, 704, and 706 using beamformed receive beam 712. For example, in time-based positioning procedures such as TDOA, RTT, etc., UE 104 may use PRS received in multiple beams, while for angle-based measurements such as AoD, base station 102 and UE 104 The PRS 706 most closely aligned with the line of sight (LOS) 710 may be used. During positioning measurements, PRS received from more than one base station may be used.

[0079] In UE-assisted mode, UE 104 may report positioning measurements for one or more received PRSs via the LPP protocol to a location server, e.g., location server 172, which may The estimated position of UE 104 may be calculated. In the UE-based mode, the UE 104 reports to the location server 172, which may include positioning information, such as positions of base stations, along with positioning measurements to calculate an estimated position of the UE 104. You can use auxiliary data provided by

[0080] With respect to LTE PRS implementations, PRS signaling provided in 5G NR, including multiple symbol and comb options per subframe, repetitions of PRS transmission in multiple subframes and on multiple beams The flexibility significantly increases processing, such as million instructions per second (MIPS), memory and power requirements. For example, Table 1 below shows the processing for one cell for different technologies using different configurations, illustrated, for example, by number of resource blocks (RBs), Inverse Fourier Fast Transform (IFFT) operations and beams. Illustrate the requirements.

technology Multiplier-Accumulator (MAC) operations normalization composition LTE 20360 One 100 RB, IFFT=2048 5G-FR1 630272 30.9 272 RB, IFFT=8192, beam = 8 5G-FR2 4954112 243.3 264 RB, IFFT=8192, beam = 64

[0081] As can be seen in Table 1, the requirements for processing PRS and the resulting power requirements for 5G FR1 or 5G FR2 are significantly greater than processing PRS using LTE.

[0082] FIG. 8 is a graph 800 illustrating eight transmit beams (B1, B2, B3, B4, B5, B6, B7, and B8) generated by a base station at FR1, as an example. Each beam includes a PRS provided over multiple positioning opportunities, e.g., 0, 160, 320, 480, 640, and 800 ms. Each PRS opportunity includes 1 subframe of PRS (N _PRS = 1) and 2 repetitions, i.e. the number of times the PRS resource (subframe) is transmitted (which can be, e.g., 1 to 32) , illustrated as two bars in each positioning opportunity. As an example, a PRS may use 2 symbols with the comb-2 option, may have 272 resource blocks (RBs), and may require 4k, 8k, or 16k operations depending on performance requirements. Using this configuration, for a single cell, the UE needs to decode 2 symbols * 8 beams * beam repetitions * N _PRS over the entire bandwidth of the PRS, especially if the PRS BW is high, which is a large processing requirement .

[0083] As illustrated in FIG. 8 at the first positioning opportunity, UE 104 configures all eight beams over the entire set of resources used by the PRS on each beam, including the total bandwidth and the total number of repetitions. can be processed. The UE 104 may select the best beams among the eight beams and, for future positioning opportunities, select the selected beams, e.g. Only B1, B5 and B6 can be processed. Although a reduced number of beams are processed for subsequent positioning opportunities, the processor and power requirements for processing a PRS over the full set of resources available to the PRS on each beam can be very large, and reducing the processing requirements is advantageous. desirable.

[0084] Accordingly, in one implementation, positioning of UE 104 may split PRS processing into two distinct modes, such as acquisition mode and tracking mode. During acquisition mode, the UE 104 performs a fast scan of all beams from base station 102 transmitting the PRS using less than the full set of resources for the PRS, while in tracking mode the UE 104 performs a fast scan of all beams from the base station 102 transmitting the PRS using less than the full set of resources for the PRS. However, it processes the full set of resources for a reduced number of beams.

[0085] FIG. 9 is a flow diagram illustrating a positioning process 900 used by a UE 104, in which PRS processing is split into two distinct modes, e.g., acquisition mode and tracking mode.

[0086] As illustrated at block 902, a determination is made as to whether the UE 104 is in acquisition mode or tracking mode. For example, acquisition mode 901 may be performed during an initial positioning opportunity or after being in tracking mode for a predetermined number of opportunities, or if there is an indication that, for example, the UE 104 may have moved or conditions may have changed. , there is an indication that the selection of beams from the initial acquisition may no longer be valid.

[0087] At block 904, the UE 104 initializes a set of resources to be used to process the PRS for each beam in acquisition mode 901. The set of resources used in acquisition mode 901 is less than the full set of resources for the PRS generated by each beam. For example, UE 104 may be aware of the full set of resources for the PRS for each beam, including the total bandwidth and total number of repetitions, through assistance data received from location server 172. UE 104 may initialize a set of resources by selecting a portion of the total bandwidth, a portion of the total number of repetitions, or a combination thereof to be used for receiving and processing the PRS. As an example, UE 104 may choose to use 1/2, 1/4, 1/8, 1/16, etc. of the total bandwidth. The receiver may be tuned, for example, to receive a portion of the total bandwidth of the PRS while in acquisition mode. Similarly, UE 104 may additionally or alternatively transmit a portion or portion of the total number of repetitions, e.g., 1/2, 1/3, etc., as long as at least one repetition (e.g., one PRS resource) is transmitted. You can choose to use 2/3, 1/4, 3/4, etc. For example, if there are two repetitions, i.e., if the PRS resource is transmitted twice, the UE 104 may choose to use either one repetition (only the initial PRS resource is transmitted) or two repetitions. If there are four repetitions, the UE 104 may choose to use 1, 2, 3, or 4 repetitions, where the resulting number of PRS resources transmitted is an integer, i.e., in the time domain, at least one A complete PRS resource (subframe) is transmitted. Accordingly, processors of UE 104 may be configured to receive and integrate over less than the full number of iterations of the PRS while in acquisition mode.

[0088] At block 906, the UE 104 receives and processes PRS signals according to an initialized set of resources and determines a signal strength metric for each beam in the plurality of beams. For example, UE 104 may receive a PRS by tuning the radio signal receiver to an initialized portion of the total bandwidth for the PRS on each beam, such as one quarter of the total bandwidth of the PRS. UE 104 may additionally or alternatively receive and integrate over a portion of the total number of repetitions for the PRS on each beam, e.g., 1, 1/2, 1/3 or 1/4 of the total number of repetitions of the PRS. can do. . UE 104 may measure one or more signal strength metrics, such as SNR, RSRP, or RSRQ for the received PRS for each beam. For example, in one implementation, the channel energy response can be calculated and used to determine peak SNR.

[0089] Figure 10 illustrates, as an example, a graph 1000 of simulated channel energy response (CER) for a PRS processed using different portions of the full set of resources (different portions of the overall bandwidth). do. For example, graph 1000 shows CER 1002 for PRS with 68 RBs and 2048 IFFT (corresponding to 1/4 of the bandwidth), and CER 1002 with 138 RBs and 4096 IFFT (corresponding to 1/2 of the bandwidth). We illustrate CER 1004 for PRS, and CER 1006 for PRS with 272 RB and 8192 IFFT (corresponding to the full bandwidth). Each of the noise layers 1012, 1014, and 1016 associated with each of the CERs 1002, 1004, and 1006 are also illustrated. Peak SNR is determined based on the difference between the CER value at tap 0 and the noise floor. For example, CER 1002 has a peak SNR of 29 dB, CER 1004 has a peak SNR of 32 dB, and CER 1006 has a peak SNR of 35 dB. Therefore, as can be seen, there is a measurable performance loss in peak SNR by reducing the set of resources used to process the PRS. For example, for every half bandwidth reduction there is approximately a 3 dB loss. Similarly, reducing the set of resources used to process PRS results in measurable performance loss in other signal strength metrics such as RSRP or RSRQ.

[0090] Referring back to FIG. 9, at block 908, one or more signal strength metrics for each beam i are compared to predetermined thresholds corresponding to the one or more signal strength metrics to determine the predetermined threshold. It may be determined whether more than a predetermined number (M) of beams have signal strength metrics and whether less than a full set of resources have been used to process the PRS. The predetermined threshold used for comparison with signal strength metrics may be selected empirically based on the sensitivity of the radio signal receiver. For example, referring to Figure 10, in some implementations, an SNR threshold of 25 dB may be used for some devices, but other thresholds may be used, such as in the range of 15 to 25. Beams with signal strength metrics exceeding predetermined thresholds are considered the best beams and are selected to be used for positioning and during tracking mode. The number of beams (M) selected may be based on the type of positioning measurement being performed. For example, a timing-based measurement may use multiple beams, such as three beams, whereas an angle-based measurement may use a single beam, such as perhaps the beam closest to the line of sight.

[0091] At block 908, if it is determined that a predetermined number (M) of beams have signal strength metrics that meet the required threshold(s), the process proceeds to block 910 before returning to block 902. Proceeding, PRS from selected beams are processed for positioning.

[0092] However, at block 908, it may be determined that fewer (or more) beams than a predetermined number (M) have signal strength metrics that meet the required threshold(s) and are captured for processing the PRS. The portion of the overall set of resources used in the mode may be increased (or decreased) correspondingly. For example, at block 908, if it is determined that less than a predetermined number (M) of beams may be selected, e.g., determining that less than the predetermined number of beams have signal strength metrics that exceed the predetermined threshold(s). If so, the process proceeds to block 912, where a portion of the overall set of resources for the PRS is increased, e.g., doubled or otherwise increased, and the capture mode is repeated. For example, at the next positioning opportunity, an increased set of resources is used to process the PRS from each beam, and one or more signal strength metrics are determined 906 and compared to corresponding thresholds. The process is such that either a predetermined number (M) of beams have signal strength metrics that meet the required threshold(s) or the entire set of resources are used and therefore no further increase in resources used to process the PRS is possible. It repeats until

[0093] Alternatively, at block 908, if it is determined that more than a predetermined number of beams have signal strength metrics that meet the required threshold(s), then only the predetermined number (M) of the beams are selected ( (e.g., the first M beams have signal strength metrics that meet the required threshold(s)), the process flows to block 910. The next time the UE 104 is in acquisition mode 901—which may be after a predetermined number of positioning opportunities or an indication that the initial selection of beams is no longer valid—or, in some implementations, the next At a positioning opportunity, a portion of the overall set of resources for the PRS may be reduced (e.g., halved) and acquisition mode 901 determines that only a predetermined number (M) of beams meet the required threshold(s). This can be repeated until we have intensity metrics.

[0094] Once a predetermined number (M) of beams have been selected during acquisition mode, at the next positioning opportunity, the process 900 proceeds through block 902 to tracking mode 903. In tracking mode 903, UE 104 receives and processes PRS from selected beams using the full set of resources for the PRS generated by each selected beam. For example, in block 920 of tracking mode, UE 104 selects the best M beams for tracking as determined in acquisition mode 901. At block 922, the PRS from the selected beams is received and processed for positioning using the full set of resources for the PRS in each selected beam. Accordingly, the receiver can be tuned to receive the full bandwidth of the PRS while in tracking mode, and the processors can be configured to receive and integrate over the entire number of iterations of the PRS while in tracking mode.

[0095] The UE 104 may return to the acquisition mode 901 after a predetermined number of positioning opportunities in the tracking mode 903. If the difference in signal strength metrics for the selected beams across multiple positioning opportunities indicates that the selection of beams from the initial acquisition mode 901 is no longer valid, e.g., the UE 104 has moved significantly and/ Or if conditions have changed, the UE 104 may also or alternatively return to acquisition mode. For example, at each positioning opportunity, one or more signal strength metrics for the selected beams, e.g., SNR, RSRP, RSRQ, etc., may be combined with measured signal strength metrics from one or more preceding positioning opportunities, e.g., from the immediately preceding positioning opportunity. Measured signal strength metrics, measured signal strength metrics from a first positioning opportunity used in tracking mode 903, or measured signal strength metrics from a plurality of positioning opportunities used in tracking mode 903. It can be compared to the average (or other statistical combination). If the difference between the signal strength metrics exceeds a predetermined threshold, the UE 104 may have moved or conditions may have changed and the initially selected beams may no longer be the best beams. Accordingly, as a result, process 900 may return to capture mode 901 at block 902.

[0096] Figures 11A and 11B show graphs 1100 and 1150 illustrating eight transmit beams (B1, B2, B3, B4, B5, B6, B7, and B8) generated by a base station at FR1, as an example. am. Similar to Figure 8, each beam includes PRS provided over multiple positioning opportunities, e.g., at 0, 160, 320, 480, 640, and 800 ms. Each PRS opportunity contains one subframe (N _PRS = 1) and two repetitions of the PRS, illustrated as two bars in each positioning opportunity. PRS can use 2 symbols with the comb-2 option, can have 272 resource blocks (RB), and can require 4k, 8k, or 16k operations depending on performance requirements. Unlike Figure 8, in Figures 11A and 11B, the UE 104 operates in acquisition mode (block 901 of Figure 9) during the first positioning opportunity, e.g., at 0 ms, during which the UE 104 Receive and process the PRS for each beam using less than a full set of resources and track the remaining positioning opportunities, e.g., 160, 320, 480, 640, and 800 ms (block 903 in FIG. 9). During operation, the UE 104 receives and processes the PRS for each beam using the entire set of resources. Two sets of capture and tracking are illustrated in Figures 11A and 11B.

[0097] In Figure 11A, UE 104 is in acquisition mode (block 901 in Figure 9) by receiving and processing the PRS for each beam using half the total bandwidth of the PRS for each beam. This works, as illustrated by the relatively shorter bars at the positioning opportunity at 0 ms. As an example, beams B1, B5 and B6 may be selected as the best beams for positioning measurements during acquisition mode at the first positioning opportunity, e.g., based on one or more signal strength metrics that meet the required threshold(s). You can. In tracking mode (block 903 in FIG. 9), at subsequent positioning opportunities, e.g., at 160, 320, 480, 640, and 800 ms, PRS from beams B1, B5, and B6 make positioning measurements. to be received and processed using the full set of resources, such as the full bandwidth of the PRS for each beam, as illustrated by the relatively longer bars.

[0098] In Figure 11B, UE 104 operates in acquisition mode by receiving and processing the PRS for each beam using one repetition of the PRS for each beam at 0 ms (block of Figure 9 ( 901)), which is illustrated by the presence of only 1 bar in the positioning opportunity at 0 ms. As an example, beams B1, B5, and B6 are selected as the best beams for positioning measurements during the acquisition mode during the first positioning opportunity, e.g., based on one or more signal strength metrics meeting the necessary threshold(s). It can be. In tracking mode (block 903 in FIG. 9), at subsequent positioning opportunities, e.g., at 160, 320, 480, 640, and 800 ms, PRS from beams B1, B5, and B6 make positioning measurements. is received and processed using the full set of resources, such as the full number of repetitions of the PRS for each beam, as illustrated by the presence of the two bars.

[0099] Figures 11A and 11B illustrate a second set of acquisition and tracking modes, where the first positioning opportunity (e.g., 0 ms) uses less than the full set of resources during acquisition mode and the remaining positioning opportunities are in tracking mode while using the full set of resources. As an example, the UE 104 may determine that signal strength metrics for one or more of beams B1, B5, and B6 after a predetermined number of positioning opportunities or at a positioning opportunity at 800 ms are detected by one or more preceding signals, e.g., during tracking mode. If the positioning opportunities change by more than a predetermined threshold, a return to acquisition mode (block 901 of FIG. 9) may be performed. After the second acquisition mode, FIGS. 11A and 11B illustrate that beams B2, B5 and B7 are selected for positioning measurements, e.g., based on one or more signal strength metrics meeting the necessary threshold(s). do.

[00100] FIG. 12 is a graph 1200 illustrating, as an example, eight transmit beams (B1, B2, B3, B4, B5, B6, B7, and B8) generated by a base station at FR1. Similar to FIG. 11A, each beam includes PRS provided over multiple positioning opportunities, e.g., at 0, 160, 320, 480, 640, and 800 ms. Each PRS opportunity contains one subframe (N _PRS = 1) and two repetitions of the PRS, illustrated as two bars in each positioning opportunity. PRS can use 2 symbols with the comb-2 option, can have 272 resource blocks (RB), and can require 4k, 8k, or 16k operations depending on performance requirements. Two sets of capture and tracking are illustrated in Figure 12.

[00101] In Figure 12, UE 104 is in acquisition mode (block 901 of Figure 9) by receiving and processing the PRS for each beam using a quarter of the total bandwidth of the PRS for each beam. )), which is illustrated by relatively shorter bars with a positioning opportunity at 0 ms. In this example, fewer than a predetermined number (3) of beams have signal strength metrics exceeding predetermined thresholds (block 908 of FIG. 9), illustrated by dashed boxes around beams B1 and B4. Accordingly, a portion of the overall set of resources for the PRS is increased, e.g., doubled, at the next positioning opportunity (block 912 of FIG. 9). At the second positioning opportunity at 160 ms, the acquisition mode is repeated using half the total bandwidth of the PRS for each beam. As half of the total bandwidth of the PRS is used for each beam, a predetermined number (3) of beams are used for 2 positioning opportunities in 160 ms, illustrated by dashed boxes for beams B1, B4, and B6. As such, it has signal strength metrics exceeding predetermined thresholds. . Accordingly, UE 104 may select beams B1, B4, and B6 for positioning measurements. At subsequent positioning opportunities during tracking mode (block 903 in FIG. 9), e.g., at 320, 480, 640, and 800 ms, PRS from beams B1, B4, and B6 are used for positioning measurements in the full set. of resources, e.g., the entire bandwidth of the PRS for each beam. In an implementation where a reduced number of repetitions are used during acquisition mode (e.g., as illustrated in FIG. 11B), if fewer than a predetermined number (3) of beams have signal strength metrics exceeding predetermined thresholds, the number of repetitions is It is increased at the next positioning opportunity, such as doubled, incrementally increased, or otherwise increased (block 912 of FIG. 9).

[00102] In a subsequent set of acquisition and tracking, e.g., after a predetermined number of positioning opportunities during tracking mode or an indication that the UE 104 has moved or conditions have changed, the UE 104 may perform a predetermined number of positioning opportunities (3). ) of beams, that is, a set of resources that successfully identified half of the total bandwidth of the PRS for each beam can be used.

[00103] FIG. 13 is a graph 1300 illustrating, as an example, eight transmit beams (B1, B2, B3, B4, B5, B6, B7, and B8) generated by a base station at FR1. Similar to FIG. 11A, each beam includes PRS provided over multiple positioning opportunities, e.g., at 0, 160, 320, 480, 640, and 800 ms. Each PRS opportunity contains one subframe (N _PRS = 1) and two repetitions of the PRS, illustrated as two bars in each positioning opportunity. PRS can use 2 symbols with the comb-2 option, can have 272 resource blocks (RB), and can require 4k, 8k, or 16k operations depending on performance requirements. Two sets of capture and tracking are illustrated in Figure 13.

[00104] In Figure 13, UE 104 is in acquisition mode (block 901 of Figure 9) by receiving and processing the PRS for each beam using half the total bandwidth of the PRS for each beam. It works. In this example, more than a predetermined number (3) of beams have signal strength metrics exceeding predetermined thresholds (block 908 of FIG. 9), and beams B1, B4, B5, and B6 are indicated with dashed boxes. It is exemplified. Accordingly, a predetermined number of beams (e.g., the first M beams), illustrated as beams B1, B2 and B5, may be selected as the best beams for positioning measurements and positioning opportunities 160, 320, 480, 640, 800 ms) can be used in tracking mode.

[00105] In the next acquisition mode, e.g., as illustrated in 0 ms of the second set of positioning opportunities, UE 104 uses, e.g., one quarter of the total bandwidth of the PRS for each beam. As illustrated, it reduces the resources used to receive and process the PRS for each beam. In this example, using reduced resources in the second acquisition mode, more than a predetermined number (3) of beams have signal strength metrics exceeding predetermined thresholds (block 908 of FIG. 9), and beams B1 , B4, and B6) are illustrated with dashed boxes. The selected beams can then be used for positioning measurements at positioning opportunities (160, 320, 480, 640, 800 ms) and tracking mode.

[00106] Figures 14A and 14B are graphs 1400 and 1450 showing savings in multiplier-accumulator (MAC) operations for a cell transmitting 8 beams in FR1 and a cell transmitting 64 beams in FR2, respectively. ) is exemplified. As illustrated in FIG. 14A , total MACs used to obtain PRS for RSTD (e.g., full set of resources across all 8 beams) over 272 RB, as illustrated by bars 1402 MACs used to obtain PRS for RSTD across 272 RB (eg, the full set of resources across 3 beams) drops from 630,272 to 241,472. As illustrated by bars 1404, total MACs used to obtain PRS for RSTD over 136 RB (e.g., half resources across all 8 beams) versus PRS for RSTD over 272 RB. MACs used to acquire (e.g., the full set of resources across three beams) drops from 298,752 to 241,472. As illustrated by bars 1406, total MACs used to obtain PRS for RSTD over 68 RB (e.g., quarter resources across all 8 beams) versus RSTD over 272 RB The MACs used to obtain PRS for (e.g., the full set of resources across three beams) are increased from 141,184 to 241,472. Processing savings (power savings) for capture mode are illustrated in Table 2.

272 R.B. 136 R.B. 68 R.B. MAC operations 630,272 298,752 141,184 percent savings 100% 47.4% 22.4%

[00107] As illustrated in Figure 14A, the total used to obtain PRS for RSTD (e.g., the full set of resources across all 64 beams) over 264 RB, as illustrated by bars 1452. MACs vs. MACs used to obtain PRS for RSTD across 264 RB (e.g., full set of resources across 3 beams) drops from 4,954,112 to 708,032. As illustrated by bars 1454, total MACs used to obtain PRS for RSTD over 132 RB (e.g., half resources across all 64 beams) versus PRS for RSTD over 264 RB MACs used to acquire (e.g., the full set of resources across three beams) drops from 2,345,984 to 708,032. As illustrated by bars 1456, total MACs used to obtain PRS for RSTD over 664 RB (e.g., quarter resources across all 64 beams) versus RSTD over 264 RB The MACs used to obtain the PRS for (e.g., the full set of resources across three beams) are reduced from 1,115,136 to 708,032. Processing savings (power savings) for capture mode are illustrated in Table 3.

264 R.B. 132 R.B. 68 R.B. MAC operations 4,954,112 2,345,984 1,115,136 percent savings 100% 47.3% 22.5%

Table 3 [00108] Accordingly, as can be seen in FIGS. 14A and 14B and Tables 2 and 3, UE 104 may receive significant processing/power savings in acquisition mode using less than all resources for the PRS. can be achieved, and the benefits are better expressed using smaller portions of the full set of resources.[00109] 15 enables supporting positioning using, e.g., an acquisition mode in which less than the full set of resources are used for PRS processing and a tracking mode in which the full set of resources is used for selected beams, as described herein. A schematic block diagram is shown illustrating certain example features of UE 1500, which may be UE 104 shown in FIG. 1, shown in FIG. UE 1500 may perform the process flows shown in FIGS. 9 and 16 and the algorithms described herein. UE 1500 may include, for example, one or more processors 1502, memory 1504, and an external interface (e.g., a wireless network interface), such as a transceiver 1510, which may be configured to use non-transitory computer-readable media ( 1520) and one or more connections 1506 (e.g., buses, lines, fibers, links, etc.) to memory 1504. UE 1500 may further include additional items not shown, such as a user interface, which may include a display, keypad, or other input device, such as a virtual keypad on the display, allowing the user to interact with the UE or satellite positioning system. Can interface with a receiver. In certain example implementations, all or part of UE 1500 may take the form of a chipset, etc. Transceiver 1510 may include, for example, a transmitter 1512 enabled to transmit one or more signals over one or more types of wireless communication networks and a receiver for receiving one or more signals transmitted over one or more types of wireless communication networks. 1514).

[00110] In some embodiments, UE 1500 may include an antenna 1511, which may be internal or external. UE antenna 1511 may be used to transmit and/or receive signals processed by transceiver 1510. In some embodiments, UE antenna 1511 may be coupled to transceiver 1510. Antenna 1511 may include more than one antenna element and may be capable of dual polarization, MIMO-capable, beamforming, beam steering, and beam tracking. In some implementations, antenna 1511 can include multiple panels, and each panel can include multiple antenna array elements. In some embodiments, measurements of signals received (transmitted) by UE 1500 may be performed at the UE antenna 1511 and the attachment point of transceiver 1510. For example, the reference measurement point for receive (transmit) RF signal measurements may be the input (output) terminal of the receiver 1514 (transmitter 1512) and the output (input) terminal of the UE antenna 1511. In a UE 1500 with multiple UE antennas 1511 or antenna arrays, an antenna connector can be viewed as a virtual point representing the aggregate output (input) of multiple UE antennas. In some embodiments, UE 1500 may measure received signals including signal strength metrics, such as SNR, RSRP, RSRQ, and positioning measurements may be processed by one or more processors 1502. . For example, UE 104 may measure signal strength metrics of each transmitted beam to determine the best beam(s) received by UE 104. For example, transmitted beams with signal strength metrics exceeding predetermined thresholds may be treated as the best beam(s). The number of beams selected as the best beams may be based on the type of positioning measurements to be performed, such as time-based measurements or angle-based measurements.

[00111] One or more processors 1502 may be implemented using a combination of hardware, firmware, and software. For example, one or more processors 1502 may implement one or more instructions or program code 1508 on a non-transitory computer-readable medium, such as medium 1520 and/or memory 1504, thereby Can be configured to perform functions. In some embodiments, one or more processors 1502 may represent one or more circuits configurable to perform at least a portion of a data signal computing procedure or process related to operation of UE 1500.

[00112] Media 1520 and/or memory 1504 may, when executed by one or more processors 1502, cause one or more processors 1502 to perform the techniques disclosed herein, a special purpose computer programmed to perform the techniques disclosed herein. Instructions or program code 1508 containing executable code or software instructions to operate as. As illustrated in UE 1500, medium 1520 and/or memory 1504 may be one or more components or modules that can be implemented by one or more processors 1502 to perform the methodologies described herein. may include. Although the components or modules are illustrated as software in a medium 1520 executable by one or more processors 1502, the components or modules may be stored in memory 1504 or within or within one or more processors 1502. It should be understood that it may be dedicated hardware outside the field. A number of software modules and data tables may reside in media 1520 and/or memory 1504 and are utilized by one or more processors 1502 to manage both communications and functionality described herein. It can be. The organization of the contents of medium 1520 and/or memory 1504 as shown in UE 1500 is exemplary only, and thus the functionality of modules and/or data structures can be combined, separated, and/or integrated into the UE. It should be recognized that 1500 may be structured in different ways depending on its implementation.

[00113] The medium 1520 and/or memory 1504 may be configured to receive a request for capability information, send a response for capability information, receive assistance data, and receive a request to provide location information. , including performing positioning measurements by receiving and measuring DL reference signals, transmitting UL reference signals, estimating position, and providing a location information response that may include positioning measurements and/or position estimation. , if implemented by one or more processors 1502, via the serving base station, via the wireless transceiver 1510, if implemented by one or more processors 1502, via the wireless transceiver 1510, to the serving base station. It may include a positioning session module 1522 that configures one or more processors 1502 to engage in a positioning session with the location server.

[00114] The medium 1520 and/or memory 1504, when implemented by one or more processors 1502, configures one or more processors 1502 to select resources to be used for receiving and processing the PRS. It may include a resource module 1524 that does. For example, during acquisition mode, one or more processors 1502 may be configured to initialize a set of resources to be used for processing the PRS for each beam based on a portion of the overall set of resources available. For example, one or more processors 1502 may be configured to tune receiver 1514 to receive a portion of the full bandwidth of the PRS while in acquisition mode and to tune receiver 1514 to the full bandwidth of the PRS while in tracking mode. It can be. In another example, during acquisition mode, one or more processors 1502 may be configured to initialize a set of resources to be used for processing the PRS for each beam based on a reduced repetition number or portion of the PRS. For example, one or more processors 1502 may be configured to receive and integrate over less than the full number of iterations of the PRS while in capture mode and to receive and integrate over the full number of iterations of the PRS while in tracking mode. One or more processors 1502 may be used to process the PRS on subsequent positioning opportunities, e.g., if fewer or more beams than a predetermined number have signal strength metrics that meet the required threshold. It can be configured to increase or decrease some of the resources. During tracking mode, one or more processors 1502 may be configured to use the full set of resources for PRS for selected beams.

[00115] The medium 1520 and/or memory 1504, when implemented by one or more processors 1502, e.g., during an acquisition mode or a tracking mode, may provide signal strength metrics for the PRS received in each beam. It may include a signal strength module 1526 that configures one or more processors 1502 to determine . For example, signal strength metrics can be SNR, RSRP, RSRQ or other types of measurements. While in acquisition mode, one or more processors 1502 may be configured to compare signal strength metrics to predetermined thresholds to determine whether the PRS received from each beam exceeds the threshold. In the tracking mode, one or more processors 1502 may generate signal strength metrics from one or more previous positioning opportunities that are the first positioning opportunity of the tracking mode, e.g., signal strength metrics generated from immediately preceding positioning opportunities or a plurality of ongoing positioning opportunities. It may be configured to compare to an average or combination of signal strength metrics from opportunities.

[00116] The medium 1520 and/or memory 1504, when implemented by one or more processors 1502, may preset the PRS based on a comparison of signal strength metrics to corresponding thresholds during an acquisition mode. and a beam selection module 1528 that configures one or more processors 1502 to select a determined number of best beams. The predetermined number of beams may be based on the type of positioning measurement being performed, for example, timing-based, which may use multiple beams, or angle-based, which may use a single beam. One or more processors 1502 may be configured to determine when fewer or more beams than a predetermined number may be selected, which prompts an increase or decrease in resources used to process the PRS. can do. One or more processors 1502 may operate in a tracking mode, e.g., after operating in a tracking mode for a predetermined number of positioning opportunities, when a selection of beams from a previous acquisition mode may no longer be valid or when a positioning opportunity in the tracking mode and may be further configured to determine when a difference between the signal strength metrics is greater than a threshold, prompting a return to acquisition mode.

[00117] The medium 1520 and/or memory 1504, when implemented by one or more processors 1502, allows the PRS from a selected number of beams to be processed using the total resources for the PRS and positioning measurements. and a tracking module 1530 that configures one or more processors 1502 to operate in a running tracking mode.

[00118] The methods described herein may be implemented by various means depending on the application. For example, these methods may be implemented in hardware, firmware, software, or any combination thereof. For a hardware implementation, one or more processors 1502 may include one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field Implemented within programmable gate arrays (FPGAs), processors, controllers, micro-controllers, microprocessors, electronic devices, other electronic units designed to perform the functions described herein, or a combination thereof It can be.

[00119] For firmware and/or software implementations, methods may be implemented using modules (eg, procedures, functions, etc.) that perform the functions described herein. Any machine-readable medium tangibly embodying instructions can be used to implement the methods described herein. For example, software codes may be stored in memory 1504 or in a non-transitory computer-readable medium 1520 that is coupled to and executed by one or more processors 1502. Memory may be implemented within one or more processors or external to one or more processors. As used herein, the term “memory” refers to any type of memory, long-term, short-term, volatile, non-volatile, or other, any specific type of memory or number of memories, or the medium on which the memory is stored. You will not be limited to their types.

[00120] If implemented in firmware and/or software, the functions may be stored as one or more instructions or program code 1508 on a non-transitory computer-readable medium, such as medium 1520 and/or memory 1504. . Examples include computer-readable media encoded with a data structure, and computer-readable media encoded with a computer program 1508. For example, a non-transitory computer-readable medium having program code 1508 stored thereon may include program code 1508 for supporting positioning using array gain distribution variation as a function of angle and frequency in a manner consistent with the disclosed embodiments. ) may include. Non-transitory computer-readable media 1520 includes physical computer storage media. A storage medium can be any available medium that can be accessed by a computer. By way of example, and not limitation, such non-transitory computer-readable media may be RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or in the form of instructions or data structures. may include any other medium that can be used to store desired program code 1508 and that can be accessed by a computer; As used herein, disk and disc include compact disk (disc), laser disk (disc), optical disk (disc), digital versatile disc (DVD), and floppy disk (disc). disk and Blu-ray disc, where disks generally reproduce data magnetically, while discs reproduce data optically using lasers. Combinations of the above should also be included within the scope of computer-readable media.

[00121] In addition to storage on computer-readable medium 1520, instructions and/or data may be provided as signals on transmission media included in a communication device. For example, a communication device may include a transceiver 1510 with signals representing commands and data. The instructions and data are configured to cause one or more processors to implement the functions outlined in the claims. That is, a communication device includes transmission media having signals representing information for performing the disclosed functions.

[00122] Memory 1504 may represent any data storage mechanism. Memory 1504 may include, for example, primary memory and/or secondary memory. Primary memory may include, for example, random access memory, read-only memory, etc. Although shown in this example as separate from one or more processors 1502, all or a portion of the primary memory may be provided within or otherwise co-located/coupled with one or more processors 1502. You must understand. Secondary memory may include, for example, memory of the same or similar type as the primary memory and/or one or more data storage devices or systems, such as, for example, disk drives, optical disk drives, tape drives, solid state memory drives, etc. You can.

[00123] In certain implementations, secondary memory may be configurable to operably receive, or otherwise couple, a non-transitory computer-readable medium 1520. As such, in certain example implementations, the methods and/or apparatuses presented herein, when executed by one or more processors 1502, are operable to perform all or portions of the example operations as described herein. The computer-implementable code 1508, which may be enabled, may take the form of all or part of a computer-readable medium 1520 on which the computer-implementable code 1508 may be stored. Computer-readable medium 1520 may be part of memory 1504.

[00124] Figure 16 shows a flow diagram for an example method 1600 for supporting positioning of a mobile device in a wireless network performed by a mobile device, such as UE 104, in a manner consistent with the disclosed implementation.

[00125] At block 1602, the mobile device receives positioning reference signals (PRS) transmitted in a plurality of beams from a base station using less than the full set of resources for the positioning reference signals (PRS) generated by each beam, e.g. , as discussed in blocks 904 and 906 of FIG. 9 and FIGS. 11A, 11B, 12, and 13, less than a full set of resources for the PRS may include less than a full bandwidth, less than a full number of repetitions in a positioning opportunity, or Includes combinations of these. Means for receiving PRSs transmitted in a plurality of beams from a base station using less than the full set of resources for the positioning reference signal (PRS) generated by each beam - less than the full set of resources for the PRS Bandwidth, sub-total number of repetitions in a positioning opportunity, or combinations thereof - for example, having dedicated hardware or memory 1504 and/or media 1520 such as UE 1500 shown in FIG. 15 A positioning session module 1522, and a wireless transceiver 1510 and one or more processors 1502 implementing executable code or software instructions within a resource module 1524.

[00126] At block 1604, the mobile device receives a predetermined number of beams from a plurality of beams, e.g., as discussed in blocks 906 and 908 of Figure 9 and Figures 11A, 11B, 12, and 13. Select the beams. Means for selecting a predetermined number of beams from a plurality of beams may, for example, have dedicated hardware or include memory 1504 and/or media 1520, such as the signal strength module of UE 1500 shown in FIG. 15 ( 1526), and one or more processors 1502 that implement executable code or software instructions within the beam selection module 1528.

[00127] At block 1606, the mobile device generates by each selected beam, e.g., as discussed in blocks 920 and 922 of FIG. 9 and FIGS. The PRS is received from the selected beams using the entire set of resources for the PRS. Means for receiving a PRS from selected beams using the full set of resources for the PRS generated by each selected beam may have, for example, a wireless transceiver 1510 and dedicated hardware or memory 1504 and/or media. (1520) One or more processors 1502 that implement executable code or software instructions, such as within the positioning session module 1522, resource module 1524, and reception module 1530 of the UE 1500 shown in FIG. 15 may include.

[00128] In one implementation, the mobile device uses the received PRS from selected beams, e.g., as discussed in block 922 of FIG. 9 and FIGS. 11A, 11B, 12, and 13, to positioning can be performed. Means for performing positioning of a mobile device using received PRS from selected beams may have, for example, a wireless transceiver 1510 and dedicated hardware or memory 1504 and/or media 1520, such as in FIG. 15 . The illustrated positioning session module 1522 and reception module 1530 of the UE 1500 may include one or more processors 1502 that implement executable code or software instructions.

[00129] In one implementation, the mobile device selects a fraction of the overall bandwidth and tunes to receive radio signals on the portion of the overall bandwidth, e.g., as discussed in blocks 904 and 906 of FIG. 9 By doing so, it is possible to receive a PRS using less than the full set of resources for the PRS generated by each beam, and by tuning to receive radio signals over the entire bandwidth, the total set of PRS generated by each selected beam can be received. PRS can be received from selected beams using the set of resources.

[00130] In one implementation, the mobile device selects a fraction of the total number of iterations for a PRS and performs a total number of iterations to receive the PRS, e.g., as discussed in blocks 904 and 906 of FIG. 9 By integrating over only a portion of the number of iterations, receiving a PRS using less than the full set of resources for the PRS generated by each beam, and by integrating over the entire number of iterations to receive the PRS, each selected beam The PRS can be received from the selected beams using the entire set of resources for the PRS generated by.

[00131] In one implementation, the mobile device controls a predetermined number of beams by determining at least one signal strength metric for each beam in the plurality of beams, e.g., as discussed at block 906 in FIG. 9. You can choose. The mobile device may compare the at least one signal strength metric to at least one corresponding predetermined threshold, e.g., as discussed at block 908 in FIG. 9 . The mobile device may select a predetermined number of beams based on a comparison of at least one signal strength metric with at least one corresponding predetermined threshold, e.g., as discussed in blocks 908 and 910 of FIG. 9 . For example, the at least one signal strength metric includes Signal to Noise Ratio (SNR), Reference Signal Received Power (RSRP), or Reference Signal Received Quality (RSRQ). means for selecting a predetermined number of beams by determining for each beam of the plurality of beams at least one signal strength metric, means for comparing the at least one signal strength metric to a corresponding at least one predetermined threshold; and means for selecting a predetermined number of beams based on a comparison of at least one signal strength metric with a corresponding at least one predetermined threshold, e.g., having dedicated hardware or using memory 1504 and/or media 1520. ), for example, may include one or more processors 1502 that implement executable code or software instructions within the signal strength module 1526 and beam selection module 1528 of the UE 1500 shown in FIG. 15.

[00132] In one implementation, the mobile device configures each beam by selecting at least one of a portion of the total bandwidth or a portion of the total number of repetitions to receive a PRS, e.g., as discussed at block 904 in FIG. A predetermined number of beams may be selected based on at least one signal strength metric. The mobile device may determine whether at least one signal strength metric exceeds a corresponding at least one predetermined threshold, e.g., as discussed in blocks 906 and 908 of FIG. 9 . The mobile device receives the PRS if the at least one signal strength metric does not exceed the corresponding at least one predetermined threshold for the predetermined number of beams, e.g., as discussed at block 912 in FIG. 9. To do this, at least one of a portion of the total bandwidth or a portion of the total number of repetitions may be increased. For example, the mobile device repeatedly increases at least one of a portion of the total bandwidth or a portion of the total number of repetitions to receive the PRS, and at least one signal strength metric corresponds to at least one signal strength metric for the predetermined number of beams. It may be determined whether at least one signal strength metric exceeds a corresponding at least one predetermined threshold until the predetermined threshold is exceeded. means for selecting at least one of a portion of the total bandwidth or a portion of the total number of repetitions for receiving a PRS, means for determining whether at least one signal strength metric exceeds a corresponding at least one predetermined threshold, and means for increasing at least one of a portion of the overall bandwidth or a portion of the overall number of repetitions to receive a PRS when the at least one signal strength metric does not exceed the corresponding at least one predetermined threshold for the predetermined number of beams has, for example, a wireless transceiver 1510 and dedicated hardware or memory 1504 and/or media 1520, such as signal strength module 1526, and beam selection module 1528 of UE 1500 shown in FIG. 15 ) and one or more processors 1502 that implement executable code or software instructions within the resource module 1524.

[00133] In one implementation, the mobile device configures each beam by selecting at least one of a portion of the total bandwidth or a portion of the total number of repetitions to receive a PRS, e.g., as discussed at block 904 in FIG. A predetermined number of beams may be selected based on at least one signal strength metric. The mobile device may determine whether at least one signal strength metric exceeds a corresponding at least one predetermined threshold, e.g., as discussed in blocks 906 and 908 of FIG. 9 . The mobile device blocks reception when at least one signal strength metric exceeds at least one corresponding predetermined threshold for more than a predetermined number of beams, e.g., as discussed in blocks 908 and 910 of FIG. 9 . A predetermined number of beams can be selected. The mobile device may reduce at least one of a portion of the total bandwidth or a portion of the total number of repetitions to receive the PRS at a subsequent positioning opportunity. means for selecting at least one of a portion of the total bandwidth or a portion of the total number of repetitions for receiving a PRS, means for determining whether at least one signal strength metric exceeds a corresponding at least one predetermined threshold, and Means for selecting a predetermined number of beams for reception when at least one signal strength metric exceeds at least one predetermined threshold corresponding to exceeding the predetermined number of beams may include, e.g., a wireless transceiver 1510 and Having dedicated hardware or memory 1504 and/or media 1520, such as signal strength module 1526, beam selection module 1528, and resource module 1524 of UE 1500 shown in FIG. 15 It may include one or more processors 1502 that implement code or software instructions.

[00134] In one embodiment, the mobile device is positioned for multiple positioning opportunities, e.g., as discussed in blocks 920 and 922 of Figure 9 and Figures 11A, 11B, 12, and 13, respectively. The PRS can be received from the selected beams using the entire set of resources for the PRS generated by the selected beam. The mobile device may determine that the difference in at least one signal strength metric between two positioning opportunities for one or more selected beams is less than a predetermined threshold, e.g., as discussed at block 922 in FIG. 9 . The mobile device determines that the difference is below a predetermined threshold, e.g., as discussed in blocks 922 and 902 of FIG. 9 and FIGS. 11A, 11B, 12, and 13. A PRS transmitted on multiple beams may be received using less resources than the entire set for the PRS. Means for receiving PRS from selected beams using the full set of resources for the PRS generated by each selected beam for multiple positioning opportunities may have, e.g., a wireless transceiver 1510 and dedicated hardware or memory. (1504) and/or medium 1520 that implements executable code or software instructions within the positioning session module 1522, resource module 1524, and reception module 1530 of UE 1500 shown in FIG. 15. It may include one or more processors 1502. Means for determining that the difference in at least one signal strength metric between two positioning opportunities for one or more selected beams is less than a predetermined threshold may have, for example, dedicated hardware or memory 1504 and/or media 1520. ), such as one or more processors 1502 implementing executable code or software instructions within the positioning session module 1522, signal strength module 1526, and beam selection module 1528 of the UE 1500 shown in FIG. 15 ) may include. After determining that the difference is below a predetermined threshold, means for receiving a PRS transmitted in a plurality of beams using the full set of resources for the PRS generated by each beam may be provided, e.g., by wireless transceiver 1510 and a dedicated Code having hardware or executable within memory 1504 and/or medium 1520, such as positioning session module 1522, resource module 1524, and beam selection module 1528 of UE 1500 shown in FIG. 15 Alternatively, it may include one or more processors 1502 that implement software instructions.

[00135] In one embodiment, the mobile device is positioned for multiple positioning opportunities, e.g., as discussed in blocks 920 and 922 of Figure 9 and Figures 11A, 11B, 12, and 13, respectively. The PRS can be received from the selected beams using the entire set of resources for the PRS generated by the selected beam. The mobile device may, e.g., as discussed in blocks 922 and 902 of Figure 9 and Figures 11A, 11B, 12, and 13, position the A PRS transmitted on multiple beams may be received using less than the full set of resources for the PRS. Means for receiving PRS from selected beams using the full set of resources for the PRS generated by each selected beam for a predetermined number of positioning opportunities may include, for example, a wireless transceiver 1510 and dedicated hardware. or executable code or software instructions within the memory 1504 and/or medium 1520, such as the positioning session module 1522, resource module 1524, and reception module 1530 of the UE 1500 shown in FIG. 15. It may include one or more processors 1502 to implement. After a predetermined number of positioning opportunities, means for receiving a PRS transmitted in a plurality of beams using less than the full set of resources for the PRS generated by each beam, e.g., a wireless transceiver 1510 and a dedicated Code having hardware or executable within memory 1504 and/or medium 1520, such as positioning session module 1522, resource module 1524, and beam selection module 1526 of UE 1500 shown in FIG. 15 Alternatively, it may include one or more processors 1502 that implement software instructions.

[00136] References throughout this specification to “an example,” “example,” “specific examples, or “exemplary implementation” refer to a claim in which a particular feature, structure, or characteristic is described in connection with the feature and/or example. Thus, "in one example," "an example," "in certain examples," or "in certain implementations" in various places throughout this specification means that the subject matter may be included in at least one feature and/or example. Occurrences of a phrase or other similar phrases do not necessarily all refer to the same feature, instance, and/or limitation. Additionally, specific features, structures, or characteristics may be combined in one or more examples and/or features.

[00137] Some portions of the detailed description contained herein are presented in terms of algorithms or symbolic representations of operations on binary digital signals stored within the memory of a particular apparatus or special purpose computing device or platform. In the context of this particular description, terms such as a specific device include a general purpose computer once programmed to perform specific operations in accordance with instructions from program software. Algorithmic descriptions or symbolic representations are examples of techniques used by those skilled in the art of signal processing or related fields to convey the substance of their work to others skilled in the art. An algorithm is considered herein and generally to be a self-consistent sequence of operations or similar signal processing that leads to a desired result. In this context, operations or processing involve physical manipulation of physical quantities. Typically, although not necessarily, these quantities may take the form of electrical or magnetic signals that can be stored, transferred, combined, compared or otherwise manipulated. Mainly for reasons of common usage, it has often proven convenient to refer to these signals as bits, data, values, elements, symbols, characters, terms, numbers, figures, etc. However, it should be understood that all of these or similar terms may be associated with appropriate physical quantities and are merely convenient labels. As is apparent from the description of this specification, unless specifically stated otherwise, throughout this specification descriptions utilizing terms such as “processing”, “computing”, “calculation”, “determination”, etc. refer to special purpose computers, special purpose computing, etc. It is recognized that the term refers to the operations or processes of a specific device, such as a device or similar special purpose electronic computing device. Accordingly, in the context of this specification, a special purpose computer or similar special purpose electronic computing device refers to the memories, registers, or other information storage, transmission devices, or displays of a special purpose computer or similar special purpose electronic computing device. Signals commonly expressed as physical electronic or magnetic quantities within devices can be manipulated or transformed.

[00138] In the preceding detailed description, numerous specific details have been set forth in order to provide a thorough understanding of the claimed subject matter. However, it will be understood by those skilled in the art that claimed subject matter may be practiced without these specific details. In other instances, methods and devices that would be known to those skilled in the art have not been described in detail so as not to obscure the claimed subject matter.

[00139] As used herein, the terms “and,” “or,” and “and/or” can have a variety of meanings, which are also expected to depend at least in part on the context in which such terms are used. . Typically, when used to associate lists, such as A, B or C, "or" means A, B, and C, which are used herein in an inclusive sense, as well as A, B, and C, which are used herein in an exclusive sense. Intended to mean B or C. Additionally, the term “one or more” as used herein can be used to describe any single feature, structure, or characteristic, or a plurality or some other combination of features, structures or characteristics. Can be used to explain. However, it should be noted that this is merely an illustrative example and the claimed subject matter is not limited to this example.

[00140] While what are presently considered to be exemplary features have been illustrated and described, it will be understood by those skilled in the art that various other modifications may be made and equivalents may be substituted without departing from the claimed subject matter. Additionally, many modifications may be made to adapt the teachings of the claimed subject matter to a particular situation without departing from the central concept described herein.

[00141] Implementation examples are described in the following numbered clauses:

[00142] Clause 1. A method for supporting positioning of a mobile device in a wireless network, performed by the mobile device, comprising:

[00143] Receiving a PRS transmitted in a plurality of beams from a base station using less than the full set of positioning reference signals (PRS) resources generated by each beam, wherein less than the full set of resources for the PRS are allocated to the total set of positioning reference signals (PRS). Includes less than a bandwidth, less than a total number of repetitions in a positioning opportunity, or a combination thereof;

[00144] selecting a predetermined number of beams from a plurality of beams; and

[00145] Receiving a PRS from the selected beams using the full set of resources for the PRS generated by each selected beam.

[00146] Clause 2. The method of clause 1 further comprises performing positioning of the mobile device using the received PRS from the selected beams.

[00147] Clause 3. The method of clause 1 or 2, wherein receiving a PRS using less than the full set of resources for the PRS generated by each beam comprises: selecting a fraction of the total bandwidth and tuning to receive radio signals on a portion of Includes tuning steps.

[00148] Clause 4. The method of any of clauses 1 to 3, wherein receiving the PRS using less than the full set of resources for the PRS generated by each beam comprises a portion of the total number of iterations for the PRS. selecting a fraction and integrating only over a portion of the total number of iterations to receive a PRS, and receiving a PRS from the selected beams using the full set of resources for the PRS generated by each selected beam. The step includes integrating over the entire number of iterations to receive the PRS.

[00149] Clause 5. The method of any one of clauses 1 to 4, wherein selecting a predetermined number of beams comprises:

[00150] determining at least one signal strength metric for each beam of the plurality of beams;

[00151] Comparing at least one signal strength metric with at least one corresponding predetermined threshold; and

[00152] Selecting a predetermined number of beams based on a comparison of at least one signal strength metric and a corresponding at least one predetermined threshold.

[00153] Clause 6. The clause 5, wherein the at least one signal strength metric includes Signal to Noise Ratio (SNR), Reference Signal Received Power (RSRP), or Reference Signal Received Quality (RSRQ).

[00154] Clause 7. The method of any of clauses 1 to 6, wherein a predetermined number of beams are selected based on at least one signal strength metric of each beam, and the method:

[00155] selecting at least one of a portion of the total bandwidth or a portion of the total number of repetitions for receiving a PRS;

[00156] determining whether at least one signal strength metric exceeds a corresponding at least one predetermined threshold; and

[00157] increase at least one of a portion of the total bandwidth or a portion of the total number of repetitions to receive a PRS when the at least one signal strength metric does not exceed the corresponding at least one predetermined threshold for the predetermined number of beams It further includes the step of ordering.

[00158] Clause 8. The method of clause 7, iteratively increasing at least one of a portion of the total bandwidth or a portion of the total number of repetitions to receive a PRS, and wherein the at least one signal strength metric is a predetermined number of beams. and determining whether the at least one signal strength metric exceeds the corresponding at least one predetermined threshold until it exceeds the corresponding at least one predetermined threshold for.

[00159] Clause 9. The method of any one of clauses 1 to 6, wherein a predetermined number of beams are selected based on at least one signal strength metric of each beam, and the method:

[00160] Selecting at least one of a portion of the total bandwidth or a portion of the total number of repetitions for receiving a PRS;

[00161] determining whether at least one signal strength metric exceeds a corresponding at least one predetermined threshold; and

[00162] The method further includes selecting a predetermined number of beams for reception when at least one signal strength metric exceeds at least one predetermined threshold corresponding to more than the predetermined number of beams.

[00163] Clause 10. The method of clause 9 further comprising reducing at least one of a portion of the total bandwidth or a portion of the total number of repetitions to receive the PRS at a subsequent positioning opportunity.

[00164] Article 11. The method of any one of Articles 1 to 10 is:

[00165] Receiving a PRS from the selected beams using the full set of resources for the PRS generated by each selected beam for multiple positioning opportunities;

[00166] determining that a difference in at least one signal strength metric between two positioning opportunities for one or more selected beams is less than a predetermined threshold; and

[00167] After determining that the difference is less than a predetermined threshold, the method further includes receiving a PRS transmitted in the plurality of beams using less than the full set of resources for the PRS generated by each beam.

[00168] Article 12. The method of any one of Articles 1 to 10 is:

[00169] receiving a PRS from the selected beams using the full set of resources for the PRS generated by each selected beam for a predetermined number of positioning opportunities; and

[00170] The method further includes receiving a PRS transmitted in a plurality of beams using less than the full set of resources for the PRS generated by each beam after a predetermined number of positioning opportunities.

[00171] Clause 13. A mobile device configured to support positioning of a mobile device in a wireless network:

[00172] A wireless transceiver configured to communicate wirelessly in a wireless network;

[00173] At least one memory;

[00174] At least one processor coupled to a wireless transceiver and at least one memory, the at least one processor comprising:

[00175] Use a wireless transceiver to receive positioning reference signals (PRS) transmitted in a plurality of beams from a base station using resources less than the full set of positioning reference signals (PRS) generated by each beam - less than the full set of PRSs. The resources of include less than a full bandwidth, less than a full number of repetitions in a positioning opportunity, or a combination thereof;

[00176] to select a predetermined number of beams from a plurality of beams; and

[00177] Configured using a wireless transceiver to receive a PRS from the selected beams using the full set of resources for the PRS generated by each selected beam.

[00178] Clause 14. The clause 13, wherein the at least one processor is further configured to perform positioning of the mobile device using received PRS from the selected beams.

[00179] Clause 15. The clause 13 or 14, wherein the at least one processor is configured to select a portion of the total bandwidth and tune the wireless transceiver to receive radio signals on the portion of the total bandwidth, whereby the beam generated by each beam configured to receive a PRS using less than the full set of resources for the selected PRS, wherein the at least one processor is configured to tune the wireless transceiver to receive radio signals over the entire bandwidth, thereby receiving the PRS generated by each selected beam. It is configured to receive PRS from selected beams using the entire set of resources.

[00180] Clause 16. The clause of any of clauses 13-15, wherein the at least one processor is configured to select a portion of the total number of iterations for the PRS and integrate only over the portion of the total number of iterations to receive the PRS. and configured to receive the PRS using less than the entire set of resources for the PRS generated by each beam, wherein the at least one processor is configured to integrate over the entire number of iterations to receive the PRS, thereby receiving the PRS for each selected beam. It is configured to receive a PRS from the selected beams using the entire set of resources for the PRS generated by.

[00181] Clause 17. The clause of any of clauses 13 to 16, wherein the at least one processor:

[00182] determine at least one signal strength metric for each beam of the plurality of beams;

[00183] compare at least one signal strength metric to a corresponding at least one predetermined threshold; and

[00184] and configured to select a predetermined number of beams based on a comparison of at least one signal strength metric with a corresponding at least one predetermined threshold.

[00185] Clause 18. The clause 17, wherein the at least one signal strength metric includes Signal to Noise Ratio (SNR), Reference Signal Received Power (RSRP), or Reference Signal Received Quality (RSRQ).

[00186] Clause 19. The method of any of clauses 13-18, wherein a predetermined number of beams are selected based on at least one signal strength metric of each beam, and the at least one processor:

[00187] to select at least one of a portion of the total bandwidth or a portion of the total number of repetitions for receiving a PRS;

[00188] determine whether at least one signal strength metric exceeds a corresponding at least one predetermined threshold; and

[00189] increase at least one of a portion of the total bandwidth or a portion of the total number of repetitions to receive a PRS when the at least one signal strength metric does not exceed the corresponding at least one predetermined threshold for the predetermined number of beams It is additionally configured to do so.

[00190] Clause 20. The clause 19, wherein the at least one processor is configured to iteratively increase at least one of a portion of the total bandwidth or a portion of the total number of repetitions to receive the PRS, and wherein at least one signal strength metric is configured to: and further configured to determine whether the at least one signal strength metric exceeds the corresponding at least one predetermined threshold until it exceeds the corresponding at least one predetermined threshold for the predetermined number of beams.

[00191] Clause 21. The method of any of clauses 13 to 18, wherein a predetermined number of beams are selected based on at least one signal strength metric of each beam, and the at least one processor:

[00192] to select at least one of a portion of the total bandwidth or a portion of the total number of repetitions for receiving a PRS;

[00193] determine whether at least one signal strength metric exceeds a corresponding at least one predetermined threshold; and

[00194] and further configured to select a predetermined number of beams for reception when at least one signal strength metric exceeds at least one predetermined threshold corresponding to more than the predetermined number of beams.

[00195] Clause 22. The clause 21, wherein the at least one processor is further configured to reduce at least one of a portion of the total bandwidth or a portion of the total number of repetitions to receive the PRS at a subsequent positioning opportunity.

[00196] Clause 23. The clause of any of clauses 13 to 22, wherein the at least one processor:

[00197] Use a wireless transceiver to receive a PRS from selected beams using the full set of resources for the PRS generated by each selected beam for multiple positioning opportunities;

[00198] determine that a difference in at least one signal strength metric between two positioning opportunities for one or more selected beams is less than a predetermined threshold; and

[00199] After determining, using the wireless transceiver, that the difference is below a predetermined threshold, further configured to receive the PRS transmitted in the plurality of beams using less than the full set of resources for the PRS generated by each beam. .

[00200] Clause 24. The method of any one of clauses 13 to 22, wherein the at least one processor:

[00201] Use a wireless transceiver to receive a PRS from the selected beams using the full set of resources for the PRS generated by each selected beam for a predetermined number of positioning opportunities; and

[00202] Further configured to receive a PRS transmitted in a plurality of beams using less than a full set of resources for the PRS generated by each beam after a predetermined number of positioning opportunities using the wireless transceiver.

[00203] Clause 25. A mobile device configured to support positioning of a mobile device in a wireless network:

[00204] Means for obtaining PRS transmitted in a plurality of beams from a base station using less than the full set of resources for positioning reference signals (PRS) generated by each beam, wherein less than the full set of resources for the PRS are Includes less than full bandwidth, less than full number of repetitions in a positioning opportunity, or a combination thereof;

[00205] means for selecting a predetermined number of beams from a plurality of beams; and

[00206] Means for receiving a PRS from selected beams using the full set of resources for the PRS generated by each selected beam.

[00207] Clause 26. The clause 25, wherein the means for obtaining a PRS using less than the full set of resources for the PRS generated by each beam comprises: means for selecting a fraction of the total bandwidth, and means for tuning to receive radio signals on a portion of the overall bandwidth, and means for receiving a PRS from the selected beams using the full set of resources for the PRS generated by each selected beam. and means for tuning to receive signals.

[00208] Clause 27. The clause 25 or 26, wherein the means for obtaining a PRS using less than the full set of resources for the PRS generated by each beam is a fraction of the total number of iterations for the PRS. means for selecting and means for integrating only over a portion of the total number of iterations to receive a PRS, and receiving a PRS from the selected beams using the full set of resources for the PRS generated by each selected beam. The means for receiving includes means for integrating over the entire number of iterations to receive the PRS.

[00209] Clause 28. A non-transitory computer-readable storage medium having program code stored thereon, the program code operable to configure at least one processor of a mobile device to support positioning of the mobile device in a wireless network, the program code Is:

[00210] Program code for receiving PRS transmitted in a plurality of beams from a base station using less than the full set of resources for positioning reference signals (PRS) generated by each beam - less than the full set of resources for the PRS includes less than full bandwidth, less than full number of repetitions in a positioning opportunity, or a combination thereof;

[00211] Program code for selecting a predetermined number of beams from a plurality of beams; and

[00212] and program code for receiving a PRS from selected beams using the full set of resources for the PRS generated by each selected beam.

[00213] Clause 29. The clause 28 of clause 28, wherein program code for receiving a PRS using less than the full set of resources for the PRS generated by each beam is configured to: select a fraction of the total bandwidth and program code for tuning a wireless transceiver to receive radio signals on a portion of the selected beams using the full set of resources for the PRS generated by each selected beam; Tune the wireless transceiver to

[00214] Clause 30. The clause 28 or 29, wherein the program code for receiving a PRS using less than the full set of resources for the PRS generated by each beam comprises a fraction of the total number of iterations for the PRS. ) and integrate only over a portion of the total number of iterations to receive the PRS, the program code for receiving the PRS from the selected beams using the full set of resources for the PRS generated by each selected beam is the PRS Integrate over the entire number of iterations to receive .

[00215] Although the present disclosure is described with respect to specific embodiments for purposes of teaching, the disclosure is not limited thereto. Various adaptations and modifications may be made to the disclosure without departing from its scope. Accordingly, the spirit and scope of the appended claims should not be limited by the above description.

Claims (30)

1. A method for supporting positioning of a mobile device in a wireless network, performed by a mobile device, comprising:
Receiving a PRS transmitted in a plurality of beams from a base station using less than the full set of positioning reference signals (PRS) generated by each beam, wherein less than the full set of resources for the PRS are includes a bandwidth of, less than a total number of repetitions in a positioning opportunity, or a combination thereof;
selecting a predetermined number of beams from the plurality of beams; and
A method for supporting positioning of a mobile device in a wireless network, comprising receiving the PRS from the selected beams using the full set of resources for the PRS generated by each selected beam. According to claim 1,
A method for supporting positioning of a mobile device in a wireless network, further comprising performing positioning of the mobile device using the received PRS from the selected beams. According to claim 1,
Receiving the PRS using less than the full set of resources for the PRS generated by each beam includes selecting a fraction of the total bandwidth and tuning to receive radio signals on the fraction of the total bandwidth. And receiving the PRS from the selected beams using the full set of resources for the PRS generated by each selected beam includes tuning to receive radio signals over the entire bandwidth. A method for supporting positioning of a mobile device in a wireless network, comprising: According to claim 1,
Receiving the PRS using less than the full set of resources for the PRS generated by each beam includes selecting a portion of the total number of repetitions for the PRS and the total number of repetitions for receiving the PRS. Integrating only over a portion of and receiving the PRS from the selected beams using the full set of resources for the PRS generated by each selected beam to receive the PRS A method for supporting positioning of a mobile device in a wireless network, comprising integrating over the entire number of iterations. According to claim 1,
Selecting the predetermined number of beams includes:
determining at least one signal strength metric for each beam of the plurality of beams;
comparing the at least one signal strength metric to a corresponding at least one predetermined threshold; and
Selecting the predetermined number of beams based on a comparison of the at least one signal strength metric and the corresponding at least one predetermined threshold. According to clause 5,
The at least one signal strength metric includes Signal to Noise Ratio (SNR), Reference Signal Received Power (RSRP), or Reference Signal Received Quality (RSRQ). According to claim 1,
the predetermined number of beams are selected based on at least one signal strength metric of each beam, and
The above method is:
selecting at least one of a portion of the total bandwidth or a portion of the total number of repetitions to receive the PRS;
determining whether the at least one signal strength metric exceeds a corresponding at least one predetermined threshold; and
At least a portion of the total bandwidth or a portion of the total number of repetitions to receive the PRS when the at least one signal strength metric does not exceed the corresponding at least one predetermined threshold for the predetermined number of beams A method for supporting positioning of a mobile device in a wireless network, further comprising the step of increasing one. According to clause 7,
iteratively increasing at least one of a portion of the total bandwidth or a portion of the total number of repetitions to receive the PRS, and wherein the at least one signal strength metric corresponds to the at least one signal strength metric for the predetermined number of beams. determining whether the at least one signal strength metric exceeds the corresponding at least one predetermined threshold until it exceeds the predetermined threshold of method. According to claim 1,
the predetermined number of beams are selected based on at least one signal strength metric of each beam, and
The above method is:
selecting at least one of a portion of the total bandwidth or a portion of the total number of repetitions to receive the PRS;
determining whether the at least one signal strength metric exceeds a corresponding at least one predetermined threshold; and
selecting the predetermined number of beams for reception when the at least one signal strength metric exceeds the corresponding at least one predetermined threshold for more than the predetermined number of beams. Method for supporting positioning of mobile devices. According to clause 9,
The method further comprises reducing at least one of the portion of the total bandwidth or the portion of the total number of repetitions to receive the PRS at a subsequent positioning opportunity. . According to claim 1,
receiving the PRS from the selected beams using the full set of resources for the PRS generated by each selected beam for multiple positioning opportunities;
determining that a difference in at least one signal strength metric between two positioning opportunities for one or more selected beams is less than a predetermined threshold; and
After determining that the difference is less than the predetermined threshold, receiving the PRS transmitted on the plurality of beams using less than the full set of resources for the PRS generated by each beam. A method for supporting positioning of a mobile device in a wireless network. According to claim 1,
receiving the PRS from the selected beams using the full set of resources for the PRS generated by each selected beam for a predetermined number of positioning opportunities; and
After the predetermined number of positioning opportunities, receiving the PRS transmitted on the plurality of beams using less than the entire set of resources for the PRS generated by each beam. A method for supporting positioning of mobile devices in a network. As a mobile device,
the mobile device is configured to support positioning of the mobile device in a wireless network,
The mobile device:
a wireless transceiver configured to communicate wirelessly in the wireless network;
at least one memory; and
At least one processor coupled to the wireless transceiver and the at least one memory,
The at least one processor:
Using the wireless transceiver, receive positioning reference signals (PRS) transmitted in a plurality of beams from a base station using resources less than the full set of positioning reference signals (PRS) generated by each beam, and - Sub-resources include less-than-full bandwidth, less-than-full number of repetitions in a positioning opportunity, or a combination thereof;
select a predetermined number of beams from the plurality of beams; and
Using the wireless transceiver, receive the PRS from the selected beams using the full set of resources for the PRS generated by each selected beam.
Configured mobile device. According to claim 13,
wherein the at least one processor is further configured to perform positioning of the mobile device using the received PRS from the selected beams. According to claim 13,
The at least one processor is configured to select a portion of the overall bandwidth and tune the wireless transceiver to receive radio signals on the portion of the overall bandwidth, thereby reducing less than the full set for the PRS generated by each beam. configured to receive the PRS using resources, and wherein the at least one processor is configured to tune the wireless transceiver to receive radio signals over the entire bandwidth, thereby providing a response to the PRS generated by each selected beam. A mobile device configured to receive the PRS from the selected beams using the full set of resources. According to claim 13,
The at least one processor is configured to select a portion of the total number of iterations for the PRS and integrate only over the portion of the total number of repetitions to receive the PRS, thereby configured to receive the PRS using less than a full set of resources, and wherein the at least one processor is configured to integrate over the full number of iterations to receive the PRS, thereby receiving the PRS generated by each selected beam. A mobile device configured to receive the PRS from the selected beams using the full set of resources for the PRS. According to claim 13,
The at least one processor:
determine at least one signal strength metric for each beam of the plurality of beams;
compare the at least one signal strength metric to a corresponding at least one predetermined threshold; and
to select the predetermined number of beams based on a comparison of the at least one signal strength metric and the corresponding at least one predetermined threshold.
A mobile device configured to select the predetermined number of beams by configuring the mobile device to select the predetermined number of beams. According to claim 17,
The at least one signal strength metric includes Signal to Noise Ratio (SNR), Reference Signal Received Power (RSRP), or Reference Signal Received Quality (RSRQ). According to claim 13,
the predetermined number of beams are selected based on at least one signal strength metric of each beam, and
The at least one processor:
select at least one of a portion of the total bandwidth or a portion of the total number of repetitions to receive the PRS;
determine whether the at least one signal strength metric exceeds a corresponding at least one predetermined threshold; and
At least a portion of the total bandwidth or a portion of the total number of repetitions to receive the PRS when the at least one signal strength metric does not exceed the corresponding at least one predetermined threshold for the predetermined number of beams to increase one
Additional configured mobile device. According to clause 19,
The at least one processor iteratively increases at least one of a portion of the total bandwidth or a portion of the total number of repetitions to receive the PRS, and determines the at least one signal strength metric for the predetermined number of beams. and determine whether the at least one signal strength metric exceeds the corresponding at least one predetermined threshold until the corresponding at least one predetermined threshold is exceeded. According to claim 13,
the predetermined number of beams are selected based on at least one signal strength metric of each beam, and
The at least one processor:
select at least one of a portion of the total bandwidth or a portion of the total number of repetitions to receive the PRS;
determine whether the at least one signal strength metric exceeds a corresponding at least one predetermined threshold; and
select the predetermined number of beams for reception when the at least one signal strength metric exceeds the corresponding at least one predetermined threshold for more than the predetermined number of beams.
Additional configured mobile device. According to claim 21,
wherein the at least one processor is further configured to reduce at least one of the portion of the total bandwidth or the portion of the total number of repetitions to receive the PRS at a subsequent positioning opportunity. According to claim 13,
The at least one processor:
receive the PRS from the selected beams using the full set of resources for the PRS generated by each selected beam for multiple positioning opportunities using the wireless transceiver;
determine that a difference in at least one signal strength metric between two positioning opportunities for one or more selected beams is less than a predetermined threshold; and
After determining that the difference is below the predetermined threshold, use the wireless transceiver to receive the PRS transmitted on the plurality of beams using less than the full set of resources for the PRS generated by each beam. so
Additional configured mobile device. According to claim 13,
The at least one processor:
Using the wireless transceiver, receive the PRS from the selected beams using the full set of resources for the PRS generated by each selected beam for a predetermined number of positioning opportunities; and
After the predetermined number of positioning opportunities, use the wireless transceiver to receive the PRS transmitted on the plurality of beams using less than the entire set of resources for the PRS generated by each beam.
Additional configured mobile device. As a mobile device,
the mobile device is configured to support positioning of the mobile device in a wireless network,
The mobile device:
Means for obtaining positioning reference signals (PRS) transmitted in a plurality of beams from a base station using less than the full set of resources for the PRS generated by each beam, wherein less than the full set of resources for the PRS are includes less than a bandwidth, less than a total number of repetitions in a positioning opportunity, or a combination thereof;
means for selecting a predetermined number of beams from the plurality of beams; and
A mobile device comprising means for receiving the PRS from the selected beams using the full set of resources for the PRS generated by each selected beam. According to clause 25,
means for obtaining the PRS using less than the full set of resources for the PRS generated by each beam, means for selecting a portion of the overall bandwidth and to receive radio signals on the portion of the overall bandwidth. means for tuning, and means for receiving the PRS from the selected beams using the full set of resources for the PRS generated by each selected beam, to receive radio signals over the entire bandwidth. A mobile device comprising means for tuning. According to clause 25,
means for obtaining the PRS using less than the full set of resources for the PRS generated by each beam, means for selecting a portion of the total number of iterations for the PRS, and means for receiving the PRS. means for integrating over only a portion of the total number of iterations, and means for receiving the PRS from the selected beams using the full set of resources for the PRS generated by each selected beam. and means for integrating over the entire number of iterations to receive the PRS. A non-transitory computer-readable storage medium storing program code, comprising:
the program code is operable to configure at least one processor of the mobile device to support positioning of the mobile device in a wireless network,
The above program code is:
Program code for receiving positioning reference signals (PRS) transmitted in a plurality of beams from a base station using less than the full set of resources for the PRS generated by each beam, the less than the full set of resources for the PRS being generated by each beam. Contains less than a full bandwidth, less than a full number of repetitions in a positioning opportunity, or a combination thereof;
Program code for selecting a predetermined number of beams from the plurality of beams; and
A non-transitory computer-readable storage medium comprising program code for receiving the PRS from the selected beams using the full set of resources for the PRS generated by each selected beam. According to clause 28,
Program code for receiving the PRS using less than the full set of resources for the PRS generated by each beam is configured to: select a portion of the total bandwidth and receive radio signals on the portion of the total bandwidth. Program code for tuning a transceiver and receiving the PRS from the selected beams using the full set of resources for the PRS generated by each selected beam, to receive radio signals on the full bandwidth. A non-transitory computer-readable storage medium for tuning a wireless transceiver. According to clause 28,
Program code for receiving the PRS using less than the full set of resources for the PRS generated by each beam, selects a portion of the total number of repetitions for the PRS, and selects a portion of the total repetition number for the PRS to receive the PRS. Program code for receiving the PRS from the selected beams, integrating only over a portion of the total number of iterations, and using the full set of resources for the PRS generated by each selected beam, A non-transitory computer-readable storage medium that integrates over an entire number of iterations to